Hot weather is genuinely dangerous for dogs, who can't cool themselves the way we do. Heatstroke can be fatal and happens fast — but nearly all summer dangers are preventable. Here's how to keep your dog safe when the temperature climbs.
Summer is a wonderful time to be outdoors with your dog, but heat is one of the most serious and underestimated dangers dogs face. Unlike us, dogs can't sweat effectively to cool down — they rely mainly on panting — so they overheat far more easily than people realize, and heatstroke can become life-threatening within minutes. The reassuring news is that almost every summer hazard is preventable with awareness. Here's what every dog owner needs to know when the mercury rises.
Heatstroke: the biggest danger
Heatstroke happens when a dog's body temperature climbs beyond what they can control, and it's a true emergency that can cause organ damage or death quickly. Warning signs include heavy, frantic panting, excessive drooling, bright red gums, weakness or wobbliness, vomiting or diarrhea, confusion, and collapse. If you suspect heatstroke, it's a medical emergency: move your dog to a cool, shaded place immediately, offer small amounts of cool (not ice-cold) water, begin cooling them with cool water on the body, and get to a vet right away — call ahead. Prevention, though, is far better than any response, and that's what the rest of this guide is about.
Watch out for hot pavement
On a sunny day, asphalt, concrete, and sand can get hot enough to burn a dog's paw pads, even when the air feels comfortable. A simple test: press the back of your hand to the pavement for seven seconds — if it's too hot for your hand, it's too hot for their paws. Walk your dog in the cooler early morning or evening, stick to grass or shaded paths, and consider protective booties for unavoidable hot surfaces. Burned pads are painful and can also contribute to overheating.
Hydration and shade
Access to fresh water and shade is essential in hot weather. Always provide plenty of cool, clean water, carry water on walks and outings, and make sure any outdoor time includes genuine shade, not just a patch that disappears as the sun moves. Dogs lose fluids rapidly through panting in the heat, so their needs rise — our guide on how much water a dog should drink helps you gauge normal intake and spot dehydration. A dog on a hot day can dehydrate surprisingly quickly.
Time exercise wisely
Vigorous exercise in the heat is a common cause of heatstroke. On hot days, shift walks and play to the cooler parts of the day — early morning and later evening — and dial back the intensity. Skip the midday run, watch your dog for signs of overheating, and let them set the pace. It's better to have a short, cool walk than a long, dangerous one. Remember that pavement is also coolest at these times, protecting their paws as well.
Which dogs are most at risk
Some dogs are far more vulnerable to heat than others. Flat-faced (brachycephalic) breeds like Bulldogs, Pugs, and Boxers can't pant efficiently and overheat dangerously fast. Overweight dogs, senior dogs, puppies, dogs with thick double coats, and those with heart or breathing conditions are also higher-risk. If your dog falls into these groups, be extra cautious — keeping a dog at a healthy weight helps (see is my dog overweight?), and older dogs need particular care in the heat, as our senior dog care guide notes.
Water safety and grooming myths
A quick word on two summer topics. First, water: swimming is great exercise and cooling, but not all dogs can swim, currents and pool edges pose risks, and you should never assume a dog is water-safe — supervise closely and rinse off chlorine or salt afterward. Second, grooming: it's a myth that shaving a double-coated dog keeps them cooler; that coat actually insulates against heat and protects against sunburn, so shaving can do more harm than good. Regular brushing to remove loose undercoat is the better approach.
Don't forget summer parasites and picnics
Warm months bring a surge in fleas and ticks, so keep up year-round parasite prevention. And summer gatherings mean more access to hazardous foods — barbecue scraps, bones, alcohol, and toxic items like grapes and onions — so keep an eye on what your dog can reach at cookouts (our guide to foods toxic to dogs covers the dangers). A little vigilance keeps summer fun from turning into an emergency vet visit.
Cooling tools and tricks
Beyond shade and water, a few simple aids help dogs beat the heat. Cooling mats and damp towels give a dog a cool surface to lie on, a paddling pool offers safe splashing for dogs who enjoy water, and frozen treats or ice cubes in the water bowl provide cooling enrichment on a scorching day. Indoors, fans and air conditioning make a real difference, especially for at-risk dogs. When you’re out, seek shaded routes and take frequent breaks. None of this replaces the core rules — limiting exercise, providing water, and never using a hot car — but small comforts go a long way toward keeping a dog genuinely comfortable through a heatwave rather than merely surviving it.
Don’t forget sunburn
It surprises many owners, but dogs can get sunburned, and it’s both painful and a long-term skin-cancer risk. Dogs with white or thin coats, pink skin, and exposed areas like the nose, ear tips, and belly are most vulnerable, as are dogs who love to sunbathe on their backs. Limit sun exposure during the most intense midday hours, provide shade, and ask your vet about pet-safe sunscreen for exposed spots on high-risk dogs — never use human sunscreen, as some ingredients are toxic to dogs if licked. A little sun sense protects your dog’s skin just as it protects yours, and it’s one more small habit that lets the whole family, four-legged members included, enjoy the sunshine safely all season long, turning the hottest months into a time of shared fun rather than avoidable risk, and giving you real peace of mind whenever the temperature climbs.
The bottom line
Summer safety for dogs comes down to respecting how poorly they handle heat: never leave a dog in a parked car, prevent heatstroke by limiting exercise in the heat and knowing the warning signs, protect paws from hot pavement, provide constant water and shade, and take extra care with flat-faced, overweight, senior, and thick-coated dogs. Nearly every hot-weather tragedy is preventable — with awareness and a few simple habits, you and your dog can enjoy summer safely.
Frequently asked questions
What are the signs of heatstroke in dogs?
Warning signs include heavy, frantic panting, excessive drooling, bright red gums, weakness or wobbliness, vomiting or diarrhea, confusion, and collapse. Heatstroke is a true emergency — move your dog to a cool, shaded place, offer small amounts of cool water, begin cooling their body with cool water, and get to a vet immediately, calling ahead.
How hot is too hot to walk my dog?
Beyond the air temperature, check the ground: press the back of your hand to the pavement for seven seconds — if it's too hot for your hand, it's too hot for your dog's paws. Walk in the cooler early morning or evening, stick to grass or shade, and avoid vigorous exercise in the heat, which is a common cause of heatstroke.
How long can a dog be in a hot car?
Never leave a dog in a parked car in warm weather, even briefly. A car's interior can reach deadly temperatures within minutes — even with windows cracked, in the shade, or on a mildly warm day — and dogs die this way every year. If you can't take your dog with you, leave them safely at home instead.
Should I shave my dog in summer to keep them cool?
Generally no, especially for double-coated breeds. It's a myth that shaving keeps them cooler — that coat actually insulates against heat and protects against sunburn, so shaving can do more harm than good. Instead, brush regularly to remove loose undercoat, and rely on shade, water, and cool timing to keep your dog comfortable.