We have all heard that 'dogs can die in hot cars' - the frightening thing is how quickly this can happen. A healthy dog can suffer fatal damage from heat stroke in only a few minutes in a car. The interior of cars can also reach damaging temperatures on days that do not seem very hot so great care should always be taken before leaving your dog in car. Heat stroke also happens to dogs outside of cars. Whenever it happens it is a true emergency and veterinary attention must be obtained immediately.