Heatstroke is a life-threatening welfare emergency in companion animals that is almost entirely preventable through owner education and behaviour change.
Heatstroke welfare in companion animals is almost entirely preventable, which makes every heatstroke death or injury an avoidable welfare failure. Dogs cannot sweat efficiently and rely on panting for thermoregulation - in hot, humid conditions or enclosed spaces like cars, this mechanism is overwhelmed rapidly. A dog left in a car on a 22-degree Celsius day with windows closed can reach dangerous temperatures within minutes, progressing to heatstroke and death. The welfare tragedy is compounded by the speed of deterioration: owners who intend to be away for only minutes may return to find their dog critically ill or dead. Public awareness campaigns have improved recognition of the risk, but thousands of preventable incidents still occur annually. Exercise-induced heatstroke is less publicised but equally serious: dogs walked or run in warm weather, particularly flat-faced breeds that cannot pant efficiently, can develop heatstroke even in temperatures that seem moderate to humans. The welfare response requires both immediate cooling (with cool water, not ice, and movement to shade) and emergency veterinary attention - heatstroke causes internal damage that continues after body temperature normalises.