As temperatures rise, so do the risks of heat-related illnesses in dogs. Unlike humans, dogs cannot regulate their body temperature well through sweating. Instead, they rely on panting and limited sweat glands in their paw pads to cool down. Recognising the early signs of heat stress and knowing how to act can save your dog’s life.
What is Heat Stress in Dogs?
Heat stress occurs when a dog’s body temperature rises above the normal range of 38.3°C to 39.2°C. If this temperature continues to climb without effective cooling, heatstroke can set in—a life-threatening emergency.
According to the Veterinary Record journal, dogs left in hot environments (such as vehicles or direct sun) are at a significantly higher risk of developing heat-related illness .
Common Signs of Heat Stress in Dogs
Look for these symptoms, especially in hot weather:
- Excessive panting
- Bright red or pale gums
- Drooling and thick saliva
- Vomiting or diarrhoea
- Lethargy or weakness
- Confusion or disorientation
- Collapsing or seizures
A 2020 study analysing heat-related illnesses in UK dogs found that respiratory changes and altered behaviour were two of the most frequently reported symptoms prior to collapse or veterinary intervention .
Immediate Steps to Take
If you suspect heat stress or heatstroke:
- Move your dog to a shaded or cool area immediately.
- Apply cold water all over the body or put them in a paddling pool/cold bath or similar. Do not leave them unattended.
- Offer water to drink.
- Use fans or ventilation to aid cooling.
- Call your vet immediately – early intervention is critical.
Prevention is Better Than Cure
Avoiding heat stress altogether is ideal. Here’s how:
- Walk your dog during cooler parts of the day (early morning or late evening).
- Always provide access to clean, cool water.
- Never leave dogs in parked cars, even for a few minutes.
- Offer cooling aids such as wet towels, fans, or cooling coats. Always monitor your dog while using these products.
- Use enrichment games inside away from the heat.
- Consider whether your dogs coat could be trapping heat/insulating them and therefore if they would be better clipped.
Product Tip:
The Quick Chill Cooling Coat for Dogs uses water-activated technology to draw heat away from your dog’s body. Lightweight and easy to use, it’s ideal for walks, car travel, and rest time during hot weather.
High-Risk Dogs to Watch Closely
Certain breeds and conditions increase the risk of heat-related illness:
- Brachycephalic (flat-faced) breeds: Bulldogs, Pugs, Cavalier King Charles Spaniels etc
- Older dogs and puppies
- Overweight dogs
- Dogs with thick coats or respiratory conditions
A study published in Scientific Reports (O’Neill et al., 2020) found brachycephalic breeds were twice as likely to develop heat-related illness than other dogs.
References
- Hall EJ, Carter AJ, O’Neill DG. “Incidence and risk factors for heat-related illness in UK dogs under primary veterinary care.” Veterinary Record, 2020.
- Hall EJ, Carter AJ, O’Neill DG. “Dogs don’t die just in hot cars—exposure to hot weather is just as deadly.” Scientific Reports, 2020. https://www.nature.com/articles/s41598-020-66015-8
- British Veterinary Association. “Brachycephalic breeds at increased risk of heatstroke.” https://www.bva.co.uk