Heatstroke in Dogs: Warning Signs and How to Keep Your Dog Cool This Summer

As the weather warms up, one of the most serious — and most preventable — dangers your dog faces is heatstroke. Dogs cool themselves far less efficiently than we do, and on a hot day a fun walk or a few minutes in a parked car can turn into a life-threatening emergency. Knowing the warning signs of overheating in dogs, and how to respond fast, can genuinely save your dog's life this summer.

What Causes Heatstroke in Dogs?

Dogs don't sweat the way people do. They shed heat mainly by panting and through a small amount of sweating on their paw pads, which means they overheat much faster than we expect. Heatstroke happens when a dog's body temperature climbs above the safe range (a healthy dog runs around 101–102.5°F) and their cooling system can't keep up. Common triggers include exercise in hot, humid weather, being left in a parked car, lack of shade or water, and even an overly enthusiastic play session on a warm afternoon.

Some dogs are especially vulnerable. Flat-faced (brachycephalic) breeds like Bulldogs, Pugs, and Boxers have a harder time panting effectively. Senior dogs, puppies, overweight dogs, and those with heart or respiratory conditions are also at higher risk and need extra care when temperatures rise.

Early Warning Signs of Overheating in Dogs

Catching heatstroke early makes all the difference. The first signs are easy to miss because they look like normal hot-weather behavior, so watch your dog closely on warm days. Early warning signs of an overheating dog include heavy, frantic panting, excessive drooling, bright red gums or tongue, and a dog that seems restless or is searching hard for water or shade.

As overheating worsens, you may notice rapid heartbeat, weakness or stumbling, vomiting or diarrhea, glazed eyes, and disorientation. Collapse, seizures, and unconsciousness are signs of advanced, dangerous heatstroke. Heatstroke can escalate within minutes and is a true emergency — if you see these severe signs, cool your dog and get to an emergency veterinarian right away rather than waiting to see if things improve.

How to Cool Down an Overheating Dog

If you suspect your dog is overheating, act immediately. Move them out of the heat into shade or air conditioning and offer small amounts of cool (not ice-cold) water to drink. Wet their body with cool water — especially the belly, armpits, and paw pads — and use a fan or moving air to help the moisture evaporate and carry heat away.

Avoid ice or freezing water, which can constrict blood vessels and actually slow cooling, and never force water into your dog's mouth. The goal is steady, gentle cooling. Even if your dog seems to bounce back, call your veterinarian: heatstroke can cause internal damage that isn't visible on the surface, and a quick check-up is always worth it.

Protecting Your Dog's Paws From Hot Pavement

Summer heat doesn't just threaten your dog from the inside — sun-baked sidewalks and asphalt can reach temperatures that burn paw pads in seconds. A simple rule: press the back of your hand to the pavement for seven seconds; if it's too hot for you, it's too hot for your dog. Walk during the cooler early morning or evening hours, and keep paws conditioned so cracked, dry pads are less prone to injury. Our All Natural Paw Pad Balm helps soothe and protect those hardworking pads through the hottest stretch of the year.

Preventing Heatstroke: Keeping Your Dog Cool This Summer

Prevention is far easier than treatment. Always provide fresh water and shade, never leave your dog in a parked car even for a minute, and schedule walks and play for the coolest parts of the day. On especially hot days, let your dog rest indoors, offer a cooling mat or a shallow kiddie pool, and skip the strenuous exercise. Tracking your dog's routine, water intake, and any heat-related episodes helps you spot patterns and share useful details with your vet. Our My Pet Journal gives you one dedicated place to log walks, weather, vet visits, and how your dog handles the heat.

Heatstroke is frightening, but it's also one of the most avoidable summer dangers. By learning the early warning signs, knowing how to cool your dog down quickly, and planning around the heat, you can keep your best friend safe, comfortable, and happy all season long.

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Paris Deesing holds a degree in Biological Anthropology from UCLA. Her articles draw on careful research and a long-held curiosity about the animals who share our lives.