Never leave a dog in the car: staying safe through summer
Dogs regulate heat differently than we do. Here's how to recognise overheating, keep your dog cool on hot days, and why the car is truly off-limits.

Summer means long days outside with your dog, wonderful, but heat is more dangerous for dogs than many people realise. They don’t sweat like we do and cool down mainly by panting. On a hot day, that can go wrong faster than you’d expect. With a bit of attention, you can keep things safe.
Suspect overheating? That’s an emergency. Cool your dog down and call your vet immediately.
The most important rule: never in a parked car
Never leave your dog behind in a parked car in warm weather. The temperature inside shoots up within minutes, even with a window cracked open, even in the shade, even “just for a moment”. This causes tragedies every single year, and it’s entirely avoidable: take your dog with you or leave him at home.
Walk at the right times
- Early and late. Walk in the early morning or evening, not during the hottest hours (roughly 11:00 - 17:00).
- Do the pavement test. Hold the back of your hand on the pavement for 5–7 seconds. Too hot for you? Then it’s too hot for your dog’s paws. Choose grass or shaded paths instead.
- Bring water. Always fresh water and a collapsible bowl. Let your dog drink and rest regularly along the way.
- Choose cooler spots. Woods, shade and safe, shallow water are ideal. When swimming, watch out for currents, and don’t let your dog drink seawater.
Recognise the signs of overheating
Take action if you notice signs such as:
- excessive, loud panting that doesn’t stop
- heavy drooling, a bright red tongue or gums
- lethargy, stumbling, confusion
- vomiting or diarrhoea
Move your dog to shade or indoors right away, offer water, and cool them down gradually with lukewarm (not ice-cold) water on the belly, armpits and paws. Call your vet in the meantime, speed matters.
Extra vulnerable
Some dogs tolerate heat worse than others: short-nosed breeds (pugs, French bulldogs…), very young or old dogs, dogs that are overweight or have a heart or respiratory condition, and dogs with a thick coat. Be extra careful with them and keep things calm.
Cool and fun
Hot days don’t have to be boring: a splash pool in the garden, a wet towel to lie on, a garden hose to chase, or a frozen lick mat will make your dog happy without overheating. And if you’re heading into the water, check out our guide to dog-friendly beaches and the seasonal rules along the coast.
Looking for a shaded spot or a safe place to swim? Browse the nature parks and recreation areas on GoPuppy. Different rules apply in winter. See walking with your dog in winter.