Heat stroke is a life-threatening welfare emergency for dogs. Prevention through awareness and rapid emergency response when it occurs saves lives and prevents suffering.
Heat stroke causes rapid, extreme suffering as body temperature overwhelms the dog's cooling capacity. The progression from distress to multi-organ failure can occur within minutes, making heat stroke one of the fastest-developing welfare emergencies in veterinary medicine. The distress experienced during heat stroke — panting, disorientation, panic, and eventually unconsciousness — is extreme. Heat stroke is almost entirely preventable through simple measures: never leaving dogs in vehicles, avoiding exercise in peak heat, ensuring shade and water access, and recognising breed-specific risk. The persistence of dog deaths in hot cars, despite extensive public awareness campaigns, reflects a continued failure to internalise the speed with which fatal heat builds in enclosed vehicles. Emergency cooling at home before reaching a vet is appropriate and lifesaving.