How to Know When It’s Too Hot for Dogs: Heat Safety Guide for Aussies

Why heat stress is a big risk for dogs

Heat stress (and the heatstroke it leads to) happens when a dog’s body overheats and can’t cool itself down. Unlike humans, dogs can’t sweat efficiently — they cool off mainly by panting, which doesn’t work well in scorching or humid weather. When the mercury climbs towards 35°C+ on a typical Aussie summer day, dogs struggle to cope. Their core temperature can shoot up, leading to life-threatening heatstroke that may cause organ failure or death.

Certain dogs are at higher risk: flat-faced breeds like pugs and bulldogs struggle to breathe in heat, big fluff-balls with thick coats (huskies, malamutes, chow chows) insulate too well, and elderly or overweight dogs overheat faster. Even very active dogs — like Bruce, who never knows when to quit — can push themselves into trouble in the heat without realising. In short, every dog is susceptible when the weather’s boiling, so we need to stay alert to the warning signs.

Signs of heat stress in your dog

Dogs can’t tell us when they’re feeling unwell, so it’s important to recognise the signs of overheating early. The most common symptoms, in roughly the order they appear: heavy or rapid panting that doesn’t ease up, excessive drooling (thick and stringy), restlessness or agitation, glazed eyes, and bright red gums or tongue. As heat stress worsens, you might see them stumbling or wobbling, vomiting, or becoming unusually weak. In severe cases — pale gums, collapse, seizures — you’re looking at full heatstroke, which is a medical emergency.

I once saw Bruce panting and wobbling after a midday play session at the park, and it scared me badly. We got him into the shade, started cooling him with cool water on his belly, and rang the vet on the way to the car. He recovered — but only because we acted in minutes, not hours. The takeaway: don’t wait to “see if it gets better.” Heatstroke moves fast, and the cooling has to start before the vet visit, not at the vet visit.

How to keep your dog cool and prevent heat stress

Nobody wants a fun day at the park turning into a vet emergency. The good news is there are plenty of practical steps to keep your dog safe from the heat. Here’s how we keep Bruce comfortable through summer (Luna the cat usually figures it out herself).

Provide shade, water and ventilation

Whether your dog is indoors or outdoors, always give them access to a cool, shaded spot with good airflow. If they’re outside, remember that shade moves with the sun — what’s shady at 11am might be blazing by 1pm. Under a tree, a covered patio or a well-ventilated kennel can all work, as long as there’s consistent shade throughout the day. Water is non-negotiable: keep a big bowl of fresh water always available, and on really hot days put out a second or third bowl. Bruce has a knack for tipping one over with his clumsy paws.

Dropping a couple of ice cubes in the water keeps it cool longer. If it’s stinking hot and still outside, set up a fan or bring your dog inside to the air-con — panting only cools them if the air around them is actually moving. The extra electricity is a small cost compared to a vet bill (or worse).

Never leave dogs in cars or hot spaces

This one’s a life-saver: never leave dogs in cars, period. Parked cars in Australia turn into ovens frighteningly fast. Even on a 25°C day, a car’s interior can hit 50°C or more within minutes — cracking the window or parking in shade barely slows it down. The RSPCA notes it can take just six minutes for a dog to die in a hot car. If you’re running errands on a warm day, leave your dog at home in a cool environment.

Time walks and exercise wisely

Walk early in the morning or late in the evening when temperatures drop. Test the pavement with your bare hand for five seconds before heading out — if it’s too hot for your hand, it’ll burn your dog’s paws. Skip the walk and play in the cool grass at home instead. On really hot or humid days, full-on exercise should be off the table entirely, even at cooler hours; a sniffy walk in the shade or some indoor mental enrichment — see our pick of the best interactive dog toys — is plenty.

Cool-down aids and other tricks

A bit of gear genuinely helps in summer. A cooling mat in the lounge gives your dog somewhere to flop that pulls heat away from their body, and a shallow kiddie pool in a shaded backyard is the cheapest dog-cooling tool we’ve ever bought — Bruce uses his every afternoon from December to March. For dogs that sleep hot, our roundup of the best dog cooling beds covers gel-fill and elevated-mesh options. Cooling vests work for active dogs that need to be outside for longer (walks, beach), and frozen treats in a tough rubber toy give your dog something to chew through while cooling from the inside. Remember too that pets can get sunburned on hot days — use dog-safe sunscreen where appropriate on ears, nose and belly.

The Zogoflex Toppl is our go-to for the frozen-treat trick — stuff it with wet dog food, mashed banana, plain pumpkin puree, or peanut butter (xylitol-free only), freeze overnight, and you’ve got 20-30 minutes of cool, focused chewing on a hot afternoon. The shape is designed so the contents don’t fall out the moment your dog tips it, and the rubber is tough enough to handle a power-chewer without splitting. Dishwasher-safe for the inevitable peanut-butter mess. A couple of these on rotation in the freezer means you always have something ready when the temperature spikes.

Beyond gear, the simple stuff still matters most: keep the routine boring on hot days — sleep through the heat, drink, eat lightly, and save the play for when the sun’s lower in the sky. Most dogs settle into the rhythm within a week or two once you stop trying to do the usual summer activities at midday.

What to do if your dog shows signs of heat stress

Even with all the precautions, accidents happen and the weather can catch us out. If you suspect your dog is overheating or in heat stress, act fast and stay calm. The 4-step emergency response:

1. Get them somewhere cool

   Move your dog out of the heat immediately — into air conditioning, or at minimum into deep shade. Every minute counts, so don’t hesitate. Carry small dogs; lead larger ones slowly.

2. Start cooling with water and airflow

   Gently pour or spray cool (not ice-cold) water onto your dog’s body. Focus on the belly, groin and paws where there’s less fur, but wet the coat all over. Get a fan or breeze on them — moving air over the wet coat is what actually pulls heat off.

3. Offer a small drink

   If your dog is conscious and able to swallow, let them lap a small amount of cool water. Don’t force it, and don’t let them gulp a big bowl — that can cause vomiting or shock. Just have water available.

4. Call the vet immediately

   Ring your local vet or emergency animal hospital as soon as you can. Describe the symptoms and what you’ve done so far; they’ll usually want you to come straight in. Have the vet’s number saved in your phone and know the nearest after-hours clinic before summer hits.

Heatstroke is a true emergency. Even if your dog seems to be recovering after the cooling, a vet check is essential — internal organ damage can happen with severe overheating, and only a vet can assess and treat it properly. Don’t take chances; getting your pup checked out is the safest move, and it pays to plan ahead for dog emergencies with vet numbers, after-hours contacts and a basic kit ready before summer hits.