Monsoon care for cats in India: four months of damp, and what it does to a cat

What the monsoon does to a cat, which is four months of air a coat cannot dry in

The monsoon does something to a cat that no single downpour does, which is to hold the air around it above 80 percent relative humidity for months without a break. Across 2019 to 2023 the longest unbroken run of days at a daily mean of 80 percent or more averaged 117 days a year in Mumbai, 126 in Pune and 135 in Kochi, against 9 in Delhi. A cat that never leaves the flat still lives in that air, and so do its coat, its ear canals, its food and its litter tray.

The numbers below are ours, computed for this page rather than quoted. We queried NASA's POWER daily point API on 21 October 2026 for relative humidity at 2 m, temperature and corrected precipitation at a city-centre point for each of twelve Indian cities, every day from 1 January 2019 to 31 December 2023, then averaged by month and counted the days at or above 80 percent. Guwahati was dropped because the grid cell POWER returns for it has an elevation of 400 m, which is a hill cell rather than the river plain the city sits on. Treat the figures as the order of magnitude they are. They describe outdoor air over a grid cell, not the inside of your flat, and an air-conditioned room is drier than any of them.

Three readings fall out of that table and none of them is the one the ranking pages give. The first is that Pune, not Mumbai, holds the highest monsoon humidity of the eleven, at 91.1, 91.6 and 91.8 percent in July, August and September, which matters because Pune is sold to pet owners as the dry, pleasant alternative to Mumbai. The second is that the west coast and Kerala get a single uninterrupted wet block, while Bengaluru and Hyderabad get a longer wet season made of shorter runs, so a Bengaluru flat does dry out between spells and a Kochi flat does not. The third is Chennai, where the south-west monsoon is the dry part of the year: July and August sit at 73.8 and 76.5 percent, and the wettest month is November, at 85.4 percent and 13.6 mm of rain a day. A cat in Tamil Nadu is on a different calendar from a cat in Maharashtra or Karnataka, and a monsoon routine started in June is started five months early.

Why the rain is the dog's problem and the humidity is the cat's

A dog gets wet because you take it out. A cat gets damp because the air it sits in is damp, and that difference changes almost every practical instruction. There is no walk to cancel, no puddle to steer around and no coat to towel at the door. What there is instead is a long, low, continuous exposure: fur that never quite finishes drying after a self-groom, an ear canal that stays warm and moist, bedding on a floor that does not dry, a litter tray in the most humid room of the flat, and an opened bag of dry food standing in 90 percent air. The monsoon care guide for dogs in India is built around the walk and the India Meteorological Department's onset dates, because for a dog those are the right spine. This page is built around humidity, because for a cat that is.

One thing a cat does that a dog does not is wet its own coat on purpose. A cat spreads saliva over its fur and lets it evaporate, which is one of the few cooling routes it has, and evaporation is exactly what slows when the surrounding air is already close to saturated. We have found no study that measures what a sustained 90 percent monsoon does to feline thermoregulation, so this is mechanism rather than measurement and we are marking it as such. The measured side of Indian heat, including the wet-bulb cities, is on the keeping a cat cool in summer guide, which covers the season this one follows.

Skin, coat and ears in sustained humidity, with the Indian numbers

Sustained humidity does three things to a cat's skin: it slows the drying of a self-groomed coat, it keeps the ear canal warm and moist, and it favours the yeasts and fungi that already live there. The one Indian study to look inside healthy cats' ears found Malassezia pachydermatis in 97 of 236 ear samples, 41.1 percent, taken from 118 adult cats with no otitis externa in Kolkata and Darjeeling, and its authors attributed the high carriage to the region's hot and humid weather.

That study is worth reading carefully, because the denominator is ears rather than cats. Both ear canals of each of 118 native Indian cats were swabbed between December 2018 and September 2019, giving 236 cerumen samples. Culture on Sabouraud's dextrose agar with olive oil recovered the yeast from 97 samples, and a nested PCR run straight from the cerumen confirmed 117, or 49.58 percent, which the authors note is 8.48 percent more sensitive than culture. None of those cats had ear disease. The yeast is a normal resident, and the question the monsoon asks is not whether it is present but whether the conditions have tipped it from commensal into pathogen.

A tropical study with a tighter design puts numbers on what changes those conditions. Niae and colleagues enrolled 53 healthy cats at a Bangkok teaching hospital between March and December 2020, screened them for feline leukaemia virus and feline immunodeficiency virus, and cultured and sequenced the yeasts in their ear canals. M. pachydermatis was the commonest organism at 50.94 percent, 95 percent confidence interval 36.84 to 64.94. Two lifestyle factors were associated with carrying it, and both are things a cat owner controls.

• Coat length. The odds of a negative culture among short-haired cats were 11.67 times those among long-haired cats, 95 percent confidence interval 3.22 to 42.24, at p equal to 0.0002. A long-haired cat in a humid month is the profile the data describes.
• How often the ears were looked at. The odds of a negative culture in cats whose ears were cleaned at intervals of two weeks or less were 5.78 times those in cats cleaned less often or never, 95 percent confidence interval 1.67 to 19.94, at p equal to 0.0055.

The climate link itself is recognised rather than proven, and the consensus guideline says so in its own words. The World Association for Veterinary Dermatology's clinical consensus guidelines on Malassezia state that it is generally recognised that Malassezia dermatitis is more common in tropical climates and during warm, humid months in more temperate latitudes, and then add that this has not specifically been studied in the dog although it is well documented in human medicine. That is an honest sentence, and no Indian monsoon page we read reproduces it. The mechanism the guidelines propose is a change in the skin's surface microclimate, with the moist niches of the ears, lips, claw folds and interdigital spaces as the places overgrowth commonly starts.

The disagreement about ear care, printed rather than averaged

Two good sources disagree about whether to clean a healthy cat's ears, and both are on this page. The 2022 feline handling guidelines take the position that in the absence of aural discomfort or disease, feline ears do not require cleaning, and our cat grooming at home guide follows that, treating the weekly ear job as a look rather than a wipe. The Bangkok study found that cats whose ears were cleaned fortnightly or more often were markedly less likely to be carrying the yeast. The study is cross-sectional, so it cannot say which way the arrow points, and owners who clean ears often are also owners who notice ear trouble early. Our reading is that the weekly look is the part to keep in the monsoon and the cleaner is the part to leave to a veterinarian who has put an otoscope down the canal first. Nothing goes into the canal that has not been looked down.

The one place the dog advice is actively wrong for a cat

A greasy, yeasty cat is not the feline version of a greasy, yeasty dog. In cats, M. pachydermatis is the predominant yeast in the ear and its isolation frequency rises in cats with otitis externa, but there is a subset of cats carrying large numbers in apparently healthy canals, and the guidelines note the suggestion that excessive otic yeast without clinical signs may indicate occult systemic disease. Beyond the ear the picture is starker. Of 15 cats in which Malassezia was found in skin biopsies submitted for histopathology, 11 presented with an acute onset of multifocal to generalised lesions and were euthanised or died within two months, and the guidelines conclude that in contrast to humans and dogs, Malassezia overgrowth in the cat, in the absence of a hypersensitivity disorder or a breed predilection, may indicate a poorer prognosis because of its association with life-threatening systemic disease.

So the sentence a dog owner can safely carry across, that an itchy animal in the rains needs a vet rather than a shampoo, becomes something more urgent for a cat. A cat that turns greasy, smells sour or develops brown waxy claw folds in July is not a grooming problem that the weather caused. It is a cat to have examined. Ringworm is the other fungal and skin infection the rains bring, and it is a separate organism with a separate literature, including three Indian studies that disagree about which season peaks; all of that sits on our ringworm in cats and dogs page and is not repeated here.

The semi-outdoor Indian cat: the terrace, the stairwell, and a shelter that works in rain

The semi-outdoor cat is the commonest arrangement in India and the one no cat page writes for. It is the cat that sleeps inside and spends its day on a terrace, a stairwell landing, a parking floor or a building compound, and when the rains start it is the cat with nowhere dry to sit. The Animal Welfare Board of India's monsoon advisory of 2026 is addressed to all compassionate citizens, animal owners and caretakers as well as to every Chief Secretary, and it asks for temporary shelters made of bamboo leaves or waterproof sheets at a dry place which is higher than ground level, well-ventilated, and at safe locations.

Read the advisory's next line closely, because it contains a tension that nobody has pointed out. It asks that such shelters be placed away from pathways, parks, staircases and parking areas where animals are more prone to accidents. Staircases and parking areas are exactly where an Indian building's cats already live. A separate clause in the same document resolves it, asking community members to allow stray animals to take shelter in their porches, garages, or any other covered space, if available. For a cat the practical reading is that a shelter inside a stairwell or a covered parking bay is right where the space is enclosed and a cat can get out of the way, and wrong where it sits in a traffic line. The advisory also asks for clean drinking water in stable containers that cannot easily be tipped over, preferably metal bowls with a wide opening, and for proper drainage to prevent water logging. The street-cat side of all of this is on our community cats in India guide.

What a shelter has to do in heavy rain is narrower than what it has to do in cold, and the build that welfare organisations publish is the same either way. Alley Cat Allies' outdoor shelter is a 30-gallon plastic tub with a 20-gallon tub inside it, a slab of styrofoam between them, a doorway cut in both sides and lined with a bottomless plastic flowerpot to make a tube entrance, lids on, and straw as bedding, not hay, because straw repels moisture while hay soaks it up and gets mouldy. The straw rule is the single most transferable line in that build for an Indian monsoon, and it rules out the thing most people reach for.

Cardboard is the material to rule out first. A courier carton is the free, obvious answer and it is a weekly replacement at best, because cardboard absorbs water and grows mould in a humid month. A hard plastic crate, a plastic storage tub or a wooden box with a lid is the version that lasts the season. Put it up before the rains rather than during them: a shelter introduced in the middle of a storm is an unfamiliar object to a frightened cat, and the one in place since May is somewhere it already sleeps.

One honest limit on this whole section. No published study has measured shelter design, uptake or welfare outcomes in semi-outdoor cats anywhere, let alone in India, and the enrichment literature says the same thing from its own side, that a cat living semi-indoors on an Indian terrace or a shared landing is neither an indoor cat nor an outdoor one and nobody has measured the arrangement. The guidance above is a welfare organisation's build plus a statutory body's advisory, applied to an Indian building. The containment question that goes with a terrace, which is netting, is on our indoor cat safety in India guide.

Leptospirosis in cats: common as an infection, rare as a disease, and there is no feline vaccine

Leptospirosis in cats is the monsoon disease that behaves nothing like its canine version, and the difference matters because the advice for dogs does not transfer. The European Advisory Board on Cat Diseases states plainly that Leptospira infection in cats is common and cats usually acquire the infection from hunting rodents, that the disease leptospirosis is considered rare in cats, that cats can shed Leptospira in their urine, and that although several vaccines are available commercially for dogs, no vaccine is available for cats.

The scale of the exposure is now measured. A 2024 systematic review and meta-analysis retained 71 articles on domestic cats, pooled 62 seroprevalence estimates at 9.95 percent, 95 percent confidence interval 7.60 to 12.54, and pooled 45 infection-prevalence estimates at 4.62 percent, 95 percent confidence interval 2.10 to 7.83. The Asian subgroup runs higher on both measures, at 11.37 percent seroprevalence across 14 estimates and 8.09 percent infection prevalence across 16, the highest of any continent in the analysis, and the authors tie that to the Asia-Pacific being where human leptospirosis is most endemic, with India's own estimated human incidence given as 19.7 cases per 100,000 population. No Indian study of cats is in that pool, and we could not find one.

Why the route differs from a dog's is the useful part. In dogs and people, indirect transmission through contaminated water is the main route, and habitats with stagnant or slow-moving warm water favour the organism; in cats, that water route is considered less likely because of the aversion of cats to swimming, although a cat may be infected by drinking from natural water sources, and cats are thought to become infected most commonly through direct rodent contact. Leptospires remain infectious for months at temperatures around 25 degrees Celsius, in moisture and in neutral soil. A monsoon does two things at once to that picture. It wets and warms the soil, and it drives rodents out of flooded burrows and drains and into buildings, which is where the cat meets them.

Flooding changes the numbers sharply where it has been measured. The ABCD guideline records a Taiwanese study that found 67.8 percent urinary shedding in cats, sampled after a natural disaster that had caused an unusual epidemic of human leptospirosis, against a worldwide pooled figure of roughly 8 percent, and a study in northeast Thailand that identified proximity to flooded areas as a significant risk factor for shedding. Those are not Indian studies and neither is directly transferable, but the direction is the one an Indian coastal city should expect.

Credit where it is due, because one ranking page gets this right. Of the ten Indian monsoon pages read for this guide, only AlcoVet, which describes itself as veterinary-reviewed, tells readers that no leptospirosis vaccine currently exists for cats, making environmental precautions even more critical for feline households. It names no reviewer, carries no denominator and sources nothing, but it is the only page in either search that notices the gap at all.

The practical instruction that follows is unusual, and it is the opposite of what a dog owner is told. You cannot vaccinate a cat against this, so the whole of the prevention is environmental. Keep the cat away from rodents and away from drinking standing water, which is the guideline's own two-part advice, and note its observation that cats kept indoors only have a very low risk of infection. Rodent control around the food bin, the drain and the terrace is therefore feline leptospirosis prevention, not just housekeeping. The disease itself, the Indian serogroup data and the canine vaccine question are on our leptospirosis in dogs in India page, which is where a household with both species should read next.

Mosquitoes, ticks and fleas: what the rains change is the timing, not the routine

The rains change the timing of parasite pressure rather than the routine that meets it, and for cats the routine is year-round anyway. Standing water breeds mosquitoes, and the mosquito is the only way heartworm reaches a cat. The American Heartworm Society's feline guidelines state that any cat living where heartworm-positive dogs and wild animals are in the vicinity is at risk, and that given that mosquitoes can enter homes, this includes indoor cats.

Why an indoor cat is not out of the mosquito's range

An indoor cat is inside the same building the mosquito is. In one retrospective study cited by the guidelines, approximately 25 percent of cats diagnosed with adult heartworms were considered indoor cats as defined by the owner, and the guidelines continue to recommend that all cats be on year-round heartworm prevention. They also note that heartworm transmission decreases in colder months but that the presence of microenvironments in urban areas suggests the risk never reaches zero, which in an Indian city with no cold months at all is a statement with no seasonal escape clause. The cat is an imperfect host and infections are light, so the Indian prevalence in cats is unknown and we are not going to guess at it; what is on record is the dog side, on our heartworm in dogs in India page, and the monthly preventives licensed for cats in India, on our cat deworming schedule for India guide. The choice of product is your vet's.

One warning from the same guidelines belongs in any Indian monsoon household, because it is the season when people reach for repellent. DEET, which is approved for human use, is not recommended for use on cats. Mosquito coils, liquid vaporisers and human repellents are household poisons for a cat and are covered with the rest of the hazard list on our indoor cat safety in India guide. Screen the window, drain the standing water on the balcony and in the plant saucers, and leave the chemistry to a product with a cat on the label.

Ticks and fleas need less space here than a dog page gives them, for a specific reason. An Indian flat never has a flea season, because nothing in it gets cold or dry enough to break the cycle, which is why the rule for cats is a cat-labelled product every month of the year rather than a monsoon course. The flea life cycle, the cat-labelled product classes sold in India, safe tick removal and the dog spot-ons that kill cats are all on our cat ticks and fleas in India guide, and nothing on this page replaces it. What the monsoon adds is only that the check gets more frequent: run a flea comb through the coat weekly while the air is wet, and look at the skin under a long coat rather than at the coat.

1. Drain the standing water you own. Plant saucers, the drip tray under the AC, a bucket on the balcony, the tank lid on the terrace. This is the only mosquito control a flat-dweller fully controls.
2. Keep the monthly parasite product going through the rains, on the label interval, chosen by your vet from a product licensed for cats.
3. Comb weekly rather than monthly while the humidity is up, and part the coat on the belly and behind the ears rather than stroking the top of it.
4. Screen the openings you can, because the same mesh that stops a cat going out stops a proportion of what comes in.
5. Never put a dog product on a cat, and never use a human repellent on one.

Food and water hygiene in damp heat: what the Indian standard actually requires

Food and water hygiene in the monsoon comes down to a mismatch between how pet food is defined and the air it ends up sitting in. The Bureau of Indian Standards defines dry pet food as pet food with a moisture content of less than 14 percent, and wet pet food as 60 percent or more, and it requires compound pet food for dogs and cats to be packed in clean, sound hermetically sealed food grade packages that are pilfer proof, moisture proof and sturdy. Every one of those protections ends the moment you cut the bag open in air that is running at 90 percent.

IS 11968:2019 is the Indian standard for pet food for dogs and cats, and it is worth knowing what it already says, because no Indian monsoon page for cats cites it. Its description clause requires that pet food shall be free from rancidity, musty odour, toxic ingredients, visible mold and insect infestation. Its Table 3, on toxic levels of contaminants, sets a maximum of 10 ppb for aflatoxin B1, 50 ppb for ochratoxins, 2,000 ppb for vomitoxin and 200 ppb for zearalenone, all expressed relative to a complete pet food at up to 12 percent moisture content. Whether every bag on an Indian shelf is tested against those limits is a separate question this page cannot answer, but the standard is the yardstick a musty bag fails against.

Where sources disagree we print the disagreement, and there is one here on our own site. Our monsoon care guide for dogs in India reports, from an international review of aflatoxicosis, that India is among the countries whose permitted maximum for aflatoxin in feed sits above the 20 micrograms per kilogram used elsewhere. The Indian pet food standard itself sets 10 ppb, which is 10 micrograms per kilogram, for aflatoxin B1 in cat and dog food specifically. Those are not the same measurement: one is a general animal feed limit reported second-hand, the other is the pet food standard read at source. We are flagging it rather than quietly harmonising the two.

The wet food pouch and the bowl that stands all afternoon

A wet food pouch is a 60-percent-water food by the Indian definition, and once it is open it is a 60-percent-water food standing in a warm room. A cat that free-feeds a saucer of wet food over six hours in a Mumbai July is eating from something the standard's heat treatment and hermetic seal stopped protecting at the moment the foil tore. That is not an argument against wet food, which is the better format for a cat's water intake and is covered on our heat safety for cats in India guide. It is an argument about the clock. Virbac India's own feline monsoon page makes the general version of the point, asking owners to ensure proper ventilation to prevent dampness and mold and to keep hygiene tight as humidity rises; what it does not do, and what no ranking page does, is name the moisture figures the Indian standard works to.

1. Buy the pack your cat finishes in three or four weeks through the wet months rather than the biggest sack on the shelf, so the bag spends less of its life open.
2. Stand the whole bag inside an airtight bin the day it is opened, rather than tipping the kibble in, because the bag is the barrier and carries the batch code. If the bag does not fit the bin, the answer is a bigger bin or a smaller pack, not tipping it out. Keep the scoop outside the bin rather than buried in the food.
3. Store it off the floor and off an outside wall, which are the two surfaces in an Indian flat that stay coldest and sweat most.
4. Pick up uneaten wet food rather than leaving it down through the afternoon, and wash the bowl rather than topping it up.
5. Throw away any food that clumps, smells musty or shows a bloom, because the standard's own description clause rules out musty odour and visible mould and your nose is the only test you have at home.
6. Change the water daily and scrub the bowl, rather than refilling a bowl with a film on it.

Water bowls in a humid flat develop a slick film faster than the same bowl does in January, and the material matters less than the scrubbing. We looked for a measured figure on how fast a cat's water bowl grows bacteria in tropical conditions and found no study of cats at all; the pet-bowl microbiology we could find is on dog bowls in temperate Europe, so we are not going to present it as a feline number. How much a cat actually drinks, what bowl shape it will use and why the water fountain evidence is thinner than the advice suggests are all on our can cats drink milk in India guide.

Litter box hygiene in the monsoon: a behaviour problem before it is a smell problem

Litter box hygiene in the monsoon is worth getting right because the first cost of getting it wrong is not the smell, it is a cat that stops using the tray. Cats are fastidious about where they eliminate, and a damp, caked, strong-smelling tray in the most humid room of the flat is a tray a cat will walk away from. House soiling that starts in July looks like a litter problem and is sometimes a urinary one, which is why the order of investigation runs vet first, tray second.

What the ranking pages assert here is confident and unsourced. Orange Pet Nutrition's monsoon litter article, fifth on the mobile results for this query, tells readers that humidity affects a cat's sense of smell, that an enclosed litter box in monsoon turns into a damp, fungal petri dish, that boxes should be sun-dried weekly, and that cats lick wet paws after stepping in damp litter and ingest bacteria; it quotes an unnamed Mumbai vet and cites nothing. Venttura's monsoon cat page, first on the same results, gives the formula humidity equals more bacteria equals smellier litter box and instructs owners to scoop twice a day and change the litter every two to three days. The scooping advice is sensible and matches what the feline guidelines ask for in any season. The mechanisms underneath it are assertions.

Here is the honest state of the evidence. No study has measured what Indian monsoon humidity does to clumping litter, to tray odour, or to the rate at which cats abandon a tray. What is established is that a cat's substrate preference is real, and that a cat which has stopped using its tray is a cat to have examined before the litter is changed, which is the order our litter guide already sets out. What follows from the humidity data is arithmetic rather than a finding, a tray in a bathroom, in a city whose air sits above 80 percent for a hundred days together, is in the wettest room of a wet building. The litter types sold in India, the box count and size, the depth, the cleaning schedule and what to do when a cat stops using the tray are all on our litter training a cat or kitten in India guide, including how to store the bag through the rains. This page covers only what the monsoon changes.

1. Move one tray out of the bathroom for the season. A utility balcony under cover, a spare room corner or a dry landing is drier than the room with the shower in it, and a second tray in a drier place costs nothing to try.
2. Scoop twice a day rather than once while the air is wet, which is the one piece of monsoon litter advice the ranking pages and the guidelines agree on.
3. Dry the empty tray completely before refilling it, because a wet tray cakes the next scoopful onto the plastic.
4. Watch for the tray being used less rather than the smell getting worse, since a cat that has started going elsewhere is telling you about the tray before you can smell it.
5. Wear gloves while you clean it, which is the leptospirosis precaution above and costs nothing.
6. Take new house soiling to a veterinarian before you change the litter, because urinary disease and a damp tray look identical from the sofa.

One correction to a claim that circulates every monsoon. Clumping litter is bentonite clay, and bentonite is hygroscopic, so an open bag in humid air does take up moisture and does cake. That much is clay chemistry and the sellers say it too. What does not follow is that a tray of clumping litter will dehumidify a room, or that a caked bag is dangerous rather than simply wasted. We could find no measurement of either in a domestic setting, and we are not going to supply one.

Flooding and waterlogging: where cats go, and why they are so hard to get out

Flooding is an annual event in Indian cities rather than a rare one, and a cat responds to it by going up and going in, which is the behaviour that makes an evacuation hard. The National Disaster Management Authority's urban flooding guidelines record Hyderabad in 2000, Ahmedabad in 2001, Delhi in 2002 and 2003, Chennai in 2004, Mumbai in 2005, Surat in 2006, Kolkata in 2007, Jamshedpur in 2008, Delhi in 2009 and Guwahati and Delhi in 2010 as the most notable urban floods, with the number of affected cities rising to 22 in 2006 and 35 in 2007.

The scale of a single event is worth seeing once. The same guidelines record that Mumbai receives an average annual rainfall of 2,401 mm, all of which comes during the monsoon months from June to September, and that on 26 July 2005 the city came to a complete halt after 944 mm of rain in 24 hours, 875 mm of it in twelve hours. A cat on a ground-floor landing or in a parking bay in that kind of event has minutes, not hours, and it will not be waiting by the door.

What a frightened cat does is the whole problem, and the welfare organisations are blunt about it. Alley Cat Allies' disaster guidance tells owners to learn their pets' hiding spots for when they are stressed or scared so they know where to look for them, to practise removing the cat from its hiding spot and placing it in a carrier or a pillow case, and, when sheltering in place, to close off any areas where a stressed cat might get stuck, such as vents or beneath heavy furniture. It also warns that cats can hide for days after severe weather before returning, and that a returning pet should not be allowed to free roam straight away because familiar scents and landmarks may have changed. The national guidance says the same thing from the policy side: owners must habituate animals to carriers and crates during peace-time to prevent panic during rapid evacuation, and the absence of permanent identification such as microchips or tags hampers reunification with owners.

• Know the hiding place before the water comes. Watch where your cat goes when the pressure cooker whistles. That is where it will be when the street floods.
• Leave the carrier out, open, all monsoon, with a familiar blanket in it, so it is furniture rather than a vet signal.
• Keep a pillow case with the carrier, which is the welfare organisations' own answer for a cat that cannot be caught in time.
• Block the gaps you cannot reach into, under a divan, behind an almirah, an open AC sleeve, before you need to find the cat in a hurry.
• Fit the identification now, because the national guideline names its absence as the thing that stops animals getting home. Our pet microchipping in India guide prices it.
• Photograph the cat this week, from the side and the front, which is what a lost-cat post needs. Our guide on how to find a lost pet in India covers the search.

Do not try to catch a community cat you do not know in a flood. Alley Cat Allies is explicit that owners evacuating should bring their pets but should not try to trap and contain unsocialised community cats, and its advice for a colony before a storm is to turn shelter and feeding station openings away from the surge and move them to slightly higher protected ground nearby. A terrified cat that is cornered will bite, and in India a bite becomes a rabies exposure question and often a complaint against the cat. Call people who do this for a living, and put the shelters up higher instead.

The indoor cat with nowhere to go for four months, and the appetite clock

An indoor cat with nowhere to go for four months loses two resources at once, the balcony and the daylight, and the thing to watch is not boredom but appetite. Our indoor cat boredom and enrichment guide already carries the monsoon enrichment calendar, the measured activity budget of a pet cat and the Indian rainy-day figures, and this page does not rebuild any of it. What it adds is the medical clock that runs alongside, because a cat that responds to a disrupted, confined, noisy season by eating less is on a shorter timer than a dog is.

A cat that stops eating for a few days in a row risks hepatic lipidosis, a potentially fatal accumulation of fat in the liver, and overweight or obese cats have a greater chance of developing it; once a cat has it, it will not usually start eating again on its own. The signs the same source lists are jaundice, lethargy, weakness, vomiting and behavioural changes, and its single instruction is that the most important thing to watch for is not eating for multiple days. Our moving house with a pet in India guide works through the same clock for a cat in a new home and sets the threshold at a phone call after 24 hours rather than 48. The monsoon version of that is a week of thunder, a flat full of people who are also indoors, and a cat that has quietly gone off its food on day two.

Weigh the cat rather than watching the bowl. A multi-cat household cannot tell from a bowl who has eaten, and a cat that is eating half as much looks the same asleep. A kitchen scale and a basket once a week through the wet months is the cheapest monitoring there is, and it catches the thing a food diary misses.

Two monsoon illnesses that look like indoor activity dropping off are not behaviour at all, and both have their own pages. Feline calicivirus persists longer in damp environments than in dry ones, which is covered with the rest of the cat flu picture on our cat flu in cats page. And in the one Indian study of feline panleukopenia with a denominator, cats presented in Chennai during the monsoon months carried the highest odds of testing positive, which is a reason to get a kitten's vaccination course finished on time rather than to delay it; that study and the schedule are on our cat vaccination schedule for India guide. Neither is re-explained here.

Monsoon signs that mean a veterinary appointment this week

To know when to see a vet in the monsoon, use six signs rather than a general sense that the cat seems off, and treat each as an appointment rather than a wait-and-see. Each one below has a sentence worth saying at the desk, because the history changes which test gets run.

1. Not eating for more than a day, in any cat, and sooner in a heavy one. Say how many days. Hepatic lipidosis follows a period of not eating and overweight cats are at greater risk.
2. A greasy coat, a rancid smell or brown waxy staining at the claw folds. Say yeast and ask for cytology. In cats, generalised Malassezia overgrowth has been associated with serious underlying disease rather than with the weather alone.
3. Head shaking, scratching at one ear, or a smell from an ear. Say otitis and ask for the canal to be looked down before anything goes into it. Around half of healthy cats already carry Malassezia in the ear, so the question is the inflammation, not the organism.
4. A round, scaly or hairless patch, especially one that a child in the house also has. Say ringworm, wash hands, and read our ringworm in cats and dogs page before trying a cream.
5. Drinking and urinating noticeably more, with lethargy, in a cat that hunts or roams. Say leptospirosis and say the cat hunts rodents. Interstitial nephritis is the commonest clinical presentation described in naturally infected cats, and there is no vaccine to rule out.
6. Coughing or laboured breathing in a cat. Say that the cat is not on heartworm prevention if it is not. Respiratory signs are the way feline heartworm usually shows, and mosquitoes reach indoor cats.

None of this is a diagnosis and none of it names a drug. Bonbeno does not recommend a medicine or a dose, which is why this page publishes under the medical disclaimer at the top. The veterinarian who examines your cat, in your city, in this week's weather, decides what is wrong with it and what it gets. The year-round routine all of this sits inside is on our adult cat care in India guide, and the changes an older cat needs are on senior cat care in India.

What this page can prove, and what it cannot

Six claims on this page are measurements with denominators behind them and six common monsoon claims about cats are not established, so the line between them is drawn here rather than left for you to guess. The split is unusually stark on this subject, because almost nothing about cats in an Indian monsoon has been studied.

Six things here are measured, and each names its source.

• Mumbai's longest unbroken run of days at 80 percent relative humidity or more averaged 117 days a year across 2019 to 2023, against 9 in Delhi, on NASA POWER daily data.
• Malassezia pachydermatis was cultured from 97 of 236 ear samples taken from 118 healthy Indian cats with no otitis externa, 41.1 percent, in Kolkata and Darjeeling.
• In 53 healthy cats in tropical Bangkok, the odds of a negative Malassezia culture were 11.67 times higher in short-haired cats than long-haired ones and 5.78 times higher where ears were cleaned fortnightly or more often.
• Pooled Leptospira seroprevalence in domestic cats is 9.95 percent across 62 studies, and 11.37 percent across the Asian ones.
• No leptospirosis vaccine is available for cats anywhere.
• India's pet food standard defines dry pet food as under 14 percent moisture and caps aflatoxin B1 at 10 ppb in food for cats and dogs.

Six further claims are not established, and this is where the page reasons rather than reports.

• No published study has measured anything about cats in an Indian monsoon. The one Indian feline figure on this page is an ear-swab prevalence, and its seasonal attribution is the authors' interpretation rather than a measured comparison between seasons.
• The link between humid climate and Malassezia disease is recognised rather than demonstrated. The veterinary dermatology consensus guidelines say so themselves, noting it has not been specifically studied even in dogs.
• Nobody has measured how sustained 90 percent humidity affects a cat's thermoregulation, its activity or its appetite. The mechanism is plausible; the measurement does not exist.
• Nobody has measured clumping litter, tray odour or tray refusal under Indian monsoon humidity, which is why this page defers the litter question rather than inventing a threshold.
• No Indian study of Leptospira in cats exists. Every feline figure here is pooled from studies run elsewhere, with Asia represented by 14 seroprevalence studies and none of them Indian.
• We found an Indian epidemiological study of dermatological conditions in cats in Thrissur, Kerala, indexed only on a site we could not open on 21 October 2026, so Indian feline skin-disease seasonality stays an open question on this page rather than a cited one.

One boundary worth stating plainly. Bonbeno does not name, rank or recommend a litter, a shampoo, an ear cleaner, a dehumidifier or a parasite product, and does not recommend a drug or a dose. Where this page says a product class, your veterinarian picks the product. Where it says a sign, your veterinarian decides what it means.