Heatstroke in dogs is a medical emergency. It can develop quickly, especially in warm weather, after exercise, during travel, or when a dog has been lying in direct sun for too long.
Knowing the warning signs can help you act faster and could make a serious difference.
Common signs of heatstroke in dogs
Watch out for symptoms such as:
- heavy or excessive panting
- lots of drooling
- bright red, pale, or tacky gums
- unusual tiredness or weakness
- vomiting or diarrhoea
- wobbling, staggering, or seeming disoriented
- glazed eyes
- collapse
Some dogs will show obvious distress, while others can deteriorate very suddenly. If your dog seems "off" in warm weather, take it seriously.
What to do straight away
If you think your dog may be overheating:
- Stop the walk or exercise immediately.
- Move your dog somewhere shaded and cooler.
- Offer water if they are able to drink — a portable dog water bottle with a built-in bowl means you always have some to hand.
- Start cooling them down.
- Contact your vet urgently for advice.
Do not wait to see if they improve on their own. Heat-related illness can worsen very quickly.
Cooling your dog down
The priority is to reduce your dog's body temperature as quickly and safely as possible while you get veterinary help. Use water and airflow, move them out of the heat, and act promptly. A dog cooling mat can help bring their temperature down once you are indoors.
If in doubt, phone your vet while you are cooling your dog so you can follow their instructions. Keeping a medical pet first aid kit nearby can also help with pre-veterinary care while you wait for assistance.
Which dogs are more at risk?
Any dog can overheat, but extra care is needed with:
- flat-faced breeds such as Pugs, French Bulldogs, and Bulldogs
- puppies and senior dogs
- overweight dogs
- dogs with breathing or heart problems
- large, heavy-coated, or unfit dogs
These dogs may need much shorter walks and a lower heat tolerance than healthy adult dogs.
To reduce risk in the first place, read our guide on what temperature is too hot to walk a dog in the UK, when to walk your dog in summer, and how to check hot pavements.
Useful products to keep on hand
Heatstroke is an emergency, so preparation matters. These products can help you stay ready when you're out and about with your dog.
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Portable Dog Water Bottle
Antibacterial, food-grade, and leak-proof — doubles as a drinking bowl. Ideal for short walks and toilet trips in warm weather.
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Medical Pet First Aid Kit
Perfect for indoor and outdoor adventures, this kit offers peace of mind for enabling pre-veterinary care in case of emergencies
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Dog Cooling Mat
Self-cooling gel mat, no water or electricity needed. Pressure-activated and non-toxic - waterproof, scratch-resistant, wear-resistant.
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If you think your dog has heatstroke, contact a vet immediately. Products can support prevention and comfort, but they do not replace urgent veterinary care.