Companion Animals

Dog Welfare in Hot Vehicles

Dogs left in hot vehicles face potentially fatal heatstroke within minutes, yet thousands of dogs die or suffer severe heat injury in vehicles each year.

Key Facts

Vehicle temperatures can reach 50 degrees C within 20 minutes on a 25 degree day
Dogs regulate body temperature primarily through panting, which is inefficient in hot still air
Heatstroke causes irreversible brain damage above 41 degrees C core temperature
UK law allows police and members of the public to break windows if a dog is in danger
French bulldogs, pugs and other brachycephalic breeds are at greatly elevated risk

Welfare Considerations

Heatstroke in dogs is an acute welfare emergency causing significant pain, distress and organ damage before death. The belief that windows left slightly open provide adequate ventilation is dangerous — it does not significantly slow temperature rise. Dogs should never be left in vehicles in warm weather, even briefly, even in shade. The welfare impact of even non-fatal heat stress includes lasting organ damage and traumatic distress.

What You Can Do

Never leave a dog in a vehicle in warm weather, even briefly or in shade
If you see a dog in distress in a hot car, call 999 and document the situation
Know the signs of heatstroke — excessive panting, drooling, collapse — and how to cool a dog safely
Spread awareness of the rapid temperature rise in parked vehicles through social media