Summer Pet Care: Prevent and Spot Heatstroke
Heatstroke kills more pets each summer than any other preventable cause. The warning signs, the breeds most at risk, and what to do in the first 5 minutes.
8 min read
Key takeaways
- Pavement test: if your hand can't stand it for 7 seconds, paws can't either.
- Flat-faced breeds overheat at temperatures other dogs handle easily.
- Cooling starts before the vet trip — but don't ice them.
Why heatstroke is so dangerous
Dogs don't sweat like humans. They cool through panting and a small amount of sweating through the paw pads. When ambient temperature and humidity overwhelm those systems, body temperature climbs fast — and damage to the kidneys, gut lining, brain, and clotting system can begin within minutes. Heatstroke is a true vet emergency with a survival rate that drops sharply with each degree of body temperature above normal.
Who is at highest risk
Flat-faced breeds (bulldogs, pugs, French bulldogs, boxers, Persian cats) — their airways can't move enough air to cool. Senior pets. Overweight pets. Puppies and kittens. Long-coated breeds. Pets with heart or respiratory disease. Black-coated pets in direct sun. Anyone exercising during the hottest hours.
Pavement temperatures kill paws fast
Asphalt at 87°F air temperature can hit 140°F. At those temperatures, paw pad burns happen in under 60 seconds. The seven-second test: place the back of your hand on the pavement. If you can't hold it there for seven seconds, it's too hot for paws. Walk on grass, walk early or late, or skip the walk.
Early heatstroke signs
Heavy panting (faster, harder, with longer tongue extension than usual). Bright red gums. Drooling thicker than normal. Reluctance to keep moving. Wobbliness. Confusion. As it progresses: vomiting, diarrhea (sometimes bloody), collapse, seizures. Catching it at heavy panting + bright red gums is the difference between a saved dog and a lost one.
First 5 minutes if you suspect heatstroke
Move to shade or air conditioning immediately. Apply cool (not ice-cold) water to paws, belly, armpits, and groin — these spots cool the body fastest. Use a fan if available. Offer small sips of cool water. Take rectal temperature if you have a thermometer; over 104°F is dangerous, over 106°F is critical. Drive to the vet — call ahead. Don't ice them: rapid extreme cooling causes vasoconstriction and slows internal cooling.
Cars in summer kill pets fast
Even on a 70°F day, a car's interior can exceed 100°F in 20 minutes. Cracked windows do almost nothing. There is no safe duration. If you see a pet locked in a hot car, in many states it's legal for citizens to break the window. Call non-emergency police first, document the situation, then act if it's escalating.
Smart prevention
Walk early morning or after sunset on hot days. Provide shade and fresh water at all times. Don't leave pets unattended in yards on hot days, especially with no shade. Put water bowls inside and outside. Frozen treats (plain bone broth ice cubes; xylitol-free peanut butter Kongs) are safe and engaging. Cooling mats and vests work, but only as supplements, not replacements for AC.
Cats in heat
Cats can heatstroke too, especially flat-faced and senior cats. Signs: panting (cats almost never pant — if yours is, that's a red flag), drooling, restlessness, vomiting. Move to AC, offer water, vet for any panting cat in the heat.
After a heatstroke event
Even if your pet seems to recover, the next 24–72 hours matter. Heatstroke can damage the gut lining and clotting system with delayed onset. Bloody diarrhea, persistent vomiting, or unusual lethargy in the days after means a vet visit. Pets that have heatstroked once are more sensitive to heat going forward — adjust your routines for life.
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