Certain breeds of dogs are more vulnerable to heatstroke, the animal charity says11:34, 26 Jun 2026Updated 11:36, 26 Jun 2026Britain is sweltering in temperatures of up to 38C as a fierce heatwave tightens its grip across much of the country, sparking urgent warnings for pet owners. The RSPCA has called on those with four particular dog breeds to exercise extra vigilance, cautioning that they are especially susceptible to heat-related illness.‌While any dog can suffer heatstroke in scorching conditions, flat-faced breeds are among the most at risk. Their compressed airways make it considerably more difficult for them to cool themselves down effectively.‌The animal welfare charity says owners of pugs, French bulldogs, shih tzus and boxers should be particularly careful during hot spells. The RSPCA warns that brachycephalic, or flat-faced, breeds face a significantly greater risk of developing heatstroke compared to other dogs.‌According to the British Veterinary Association, heatstroke can take hold rapidly in dogs and should always be treated as a veterinary emergency. Tell-tale signs include excessive panting, laboured breathing, drooling, lethargy, vomiting and collapse.The alert comes as large swathes of the UK endure yet another bout of exceptionally hot weather, with the Met Office issuing heat warnings across parts of the country. Forecasters caution that prolonged periods of intense heat pose a danger not only to people, but also to animals that struggle to stay cool.‌The RSPCA recommends that owners take dogs out during the coolest parts of the day, steer clear of vigorous exercise, ensure they have constant access to fresh drinking water, and always provide a cool, shaded spot to rest. The charity also stresses that dogs should never be left in a parked car, even briefly, as temperatures can soar to dangerous levels within minutes.Research highlighted by the Royal Veterinary College has revealed that flat-faced breeds, overweight dogs and older animals are amongst those most vulnerable to heatstroke. The organisation notes that many cases arise following exercise or walks in warm weather, rather than simply from dogs being left in hot vehicles.Experts warn that swift action is essential if a dog begins displaying signs of overheating. The RSPCA recommends moving your pet into the shade, offering fresh, cool water and beginning to cool them down with cool — not ice-cold — water, before seeking immediate veterinary attention if heatstroke is suspected.‌Emily Hall, lecturer and lead canine heatstroke researcher at the Royal Veterinary College, told the British Veterinary Association: "Dogs die in hot cars and on hot walks. Owners must avoid known triggers to heat-related illness-especially during heatwaves. If in doubt, don't go out."If there is concern a dog has overheated, our advice is: cool first, transport second. The longer we allow our dogs to remain hot, the more damage occurs, increasing the risk of heatstroke fatalities.Article continues below"If you spot early signs of your dog overheating, simply stopping exercise may not be enough. Owners need to think ahead and plan how they will cool their dogs in an emergency, especially after exercise or while travelling."