How to keep your cat cool and safe through an Australian summer

How cats handle heat (and why it fails fast)

A cat is built to conserve heat, not shed it. Where we sweat across most of the body to cool down, the sweat glands a cat can actually cool with sit in the paw pads — a fraction of its surface, and next to useless on a hot day. So a cat cools itself in slower, more roundabout ways: it grooms, spreading saliva that carries a little heat off as it evaporates, and it goes looking for the coldest surface in the house to press against and hand its warmth to. That instinct to seek out a cool floor is the single most reliable thing a cat does in the heat, and it pays to make that spot as cold as you can.

Panting is the exception, and it matters because of what it signals. A cat only pants when the quieter methods have failed and its core temperature is climbing — unlike a dog, for which panting is routine. A cat's normal body temperature sits a touch above ours, around 38 to 39°C, and the margin before that becomes dangerous is small. That's the whole problem with feline heat stress: the animal looks calm, does nothing dramatic, and then tips over a threshold quickly once its limited cooling runs out. It also explains why a cat that seems fine one hour can be in real trouble the next, and why you can't wait for obvious distress before you step in.

The cats that feel it most

Every cat is at risk once it's hot enough, but some begin the day with less margin. The RSPCA singles out Persian and Himalayan cats — the pushed-in, flat-faced breeds — as especially vulnerable, since a short face leaves them far less able to cool themselves by breathing. Age counts as well: very young kittens and older cats hold their temperature badly, extra body weight acts like a coat that can't come off, and a heart or respiratory problem eats into whatever cooling reserve a cat has. A long, dense coat is its own liability, keeping warmth pressed against the skin on the day a cat most needs to lose it.

Sun is the other half of it. White cats and cats with pale or sparse fur burn easily on the ears and nose, and the same RSPCA guidance flags white-haired cats as prone to sunburn — a real risk for the cat that likes to bake on a sunny windowsill. If your cat ticks one of these boxes, watch them harder on the days that count.

Spotting heat stress before it's an emergency

Because a cat hides discomfort, the early signs are subtle and easy to explain away. The first thing you'll usually notice is a cat that's more lethargic than the heat alone should explain — flat, unwilling to move, uninterested in food. Look next for faster breathing, and for any panting at all: a cat breathing with its mouth open is not cooling off the way a dog does, it's in difficulty. Drooling or thick, stringy saliva, restlessness, and gums that look bright red or unusually dark are all further up the same scale.

As heat stress becomes heatstroke, the picture turns serious fast: wobbliness or stumbling, vomiting, and finally collapse or seizures. At that point you're in emergency territory and every minute counts. The safest habit is to know what your own cat looks like when it's comfortable, so the day it isn't stands out immediately — a quiet cat pressed flat in the shade is fine; a quiet cat panting is not.

Setting your cat up to stay cool

The goal on a hot day is simple: give your cat somewhere the heat is lower, and make it easy to get to. The RSPCA advises giving cats access to cool areas and confining them indoors when it's too hot outside, along with fresh water and a stroke of a damp towel to help them shed heat. In practice that means picking one room that stays cool through the afternoon — usually the one furthest from the western sun, with hard floors like tile or boards that hold the cool. Draw the blinds early, before the day heats up, and get air moving with a fan or the air-conditioner, because moving air carries heat away from a cat's coat, which still air leaves sitting there.

A cooling mat gives that heat-seeking instinct a better target than bare tiles: a passive gel or cooling-fibre pad pulls warmth out of whatever settles on it, with no power or freezer involved. It's one part of the setup, and our guide to the best cooling mats for cats covers which type suits a kneader versus a placid sleeper. Beyond that, the basics still do the heavy lifting. Never shut a cat in a sunroom, laundry or garage, and never in a parked car — all of them turn into heat traps faster than people expect. And brush a long-coated cat regularly through summer, to clear the loose undercoat that traps warmth. Resist the urge to shave a cat right down, though — the coat also shields the skin from sunburn, so a light de-shed does more good than a hard clip.

Water: the cooling tool cats fight you on

Hydration is where cats work against their own interests. They come from desert-hunting ancestors and carry little instinct to seek out water, so plenty of cats under-drink — and a dehydrated cat handles heat far worse. The fixes are small and they stack. Put water in several spots around the home, so a drink is never more than a short walk away, and keep at least one source away from the food bowl, which many cats prefer. Wet food helps more than people realise, carrying most of its weight as moisture straight into a reluctant drinker.

Moving water is the other lever. Cats are often drawn to a flowing stream over a still bowl, which is why a fountain can turn a poor drinker into a steady one, and a few ice cubes dropped in a bowl keep it cooler and more tempting on a scorching afternoon. It's worth watching for the flip side too: a cat that suddenly drinks far more than usual, or far less, is telling you something, and either can matter in the heat. For how much a cat should be getting through in the first place, our guide to how much water a cat needs each day puts a number on it by body weight.

If your cat overheats: what to do

If you think your cat has crossed from uncomfortable into real heat stress, move quickly and keep your head. What you do in the first few minutes counts most, and the cooling begins at home, before the car, not at the vet.

1. Move them somewhere cool

   Get your cat out of the heat straight away — into an air-conditioned room, or at least deep shade with moving air. Carry them if they'll let you; don't make an overheating cat walk far.

2. Wet the coat with cool water

   Wet the coat with cool water (never ice-cold), or stroke it with a damp towel as the RSPCA suggests, focusing on the belly, paws and under the legs. Aim a fan across the damp fur or open it to a through-breeze, which is what draws the heat off. Ice-cold water can shock the system and is best avoided. Stop actively cooling once the cat's breathing starts to settle — cooling can overshoot and drop a cat's temperature too far, so from that point it's the vet's call, not yours.

3. Offer a little water

   If your cat is alert and able to drink, let it take a few sips of cool water. Never push it, and don't worry if it refuses — just make water available while you cool it down.

4. Ring the vet immediately

   Call your vet or the nearest after-hours clinic while you cool the cat, and describe what you're seeing. Heatstroke can cause internal organ damage that isn't visible, so a cat that seems to bounce back still needs checking. Have the number saved before summer starts.

The reassuring part is how rarely it comes to this when the day-to-day setup is right. A cool room, water your cat will use, shade drawn early and a close eye on the cats that feel heat most will head off nearly every hot-weather scare before it begins.