What early signs tell me my dog is sliding into heatstroke?
Frantic panting that will not settle, thick drool, brick-red gums, and wobbly walking are the slide into heatstroke — start cooling with tepid water and drive to a veterinary hospital at once.
Dogs shed heat mainly by panting, so humid days, parked cars, and hard exercise overwhelm them faster than they overwhelm people. Flat-faced breeds, overweight dogs, seniors, and thick-coated breeds run out of cooling capacity soonest.
Cooling correctly while you go
The progression runs from heavy panting and drooling to brick-red gums, vomiting or diarrhea, staggering, and finally collapse or seizures. Move the dog to shade, wet the body — especially belly, armpits, and paws — with cool or tepid water, and keep air moving over it in the car. Skip ice baths and ice packs: clamping the skin vessels shut traps heat in the core, and shivering generates more.
Heat tolerance varies widely between individuals, and the visible recovery can be deceptive — clotting problems and kidney or gut damage may surface hours after the dog seems to cool down. Even if your dog perks up on the way, continue to the veterinary hospital and have it examined immediately; heatstroke is judged by what the organs did, not by how the dog looks in the parking lot.
MediIndex articles are for general information only and are not medical advice, diagnosis, or advertising. Outcomes vary by individual — consult a board-certified specialist for personal decisions.