Heatstroke in Dogs: Recognising the Signs Before It’s an Emergency

Australian summers are tough on dogs, and heatstroke can develop faster than most owners realise — often within minutes in the wrong conditions. Knowing the early signs can be the difference between a scare and a genuine emergency.

What are the early signs of heatstroke in dogs?

Heavy panting, excessive drooling, bright red gums, and lethargy are usually the first signs. As it progresses, dogs may become disoriented, vomit, or develop diarrhoea — at which point it’s a genuine emergency, not a wait-and-see situation.

Which dogs are most at risk?

Flat-faced (brachycephalic) breeds like French Bulldogs and Pugs are at significantly higher risk because their airway structure makes panting — a dog’s main cooling mechanism — less effective. Senior dogs, overweight dogs, and dogs with thick double coats are also more vulnerable.

Is a hot car really that dangerous?

Yes, and far more than most people expect. On a 29-degree day, the inside of a car can exceed 40 degrees within ten minutes, even with windows cracked. Dogs should never be left in a parked car, even briefly, once temperatures start climbing.

What should you do if you suspect heatstroke?

Move your dog to a cool, shaded area immediately, offer small amounts of cool (not iced) water, and apply cool, wet towels to their neck, armpits and groin while arranging urgent veterinary care. Ice or very cold water can actually worsen the situation by constricting blood vessels near the skin.

How can heatstroke be prevented in the first place?

Exercise dogs during the cooler parts of the day, always provide shaded access to water, and never leave a dog without ventilation and shade on a hot day. Paw pads are also vulnerable — if pavement is too hot to hold your hand on for five seconds, it’s too hot for your dog’s paws.

Does pet insurance cover heatstroke treatment?

Heatstroke is a medical emergency and is generally covered as an accidental or illness event under a PetsOnMe pet insurance plan, subject to your plan’s terms — another reason it’s worth having cover in place well before an Australian summer arrives, not after the first hot weekend.

Recognising the early signs — and acting on them immediately rather than waiting to see if things improve — is what keeps a hot day from turning into an emergency vet visit.