On a 78-degree day, the temperature inside a shaded car is 90 degrees, while the inside of a car parked in the sun can reach 160 degrees in minutes. Heatstroke can kill your pet or your child in a very short time!
Please, please do not ever leave your dog or child in a parked car in the summertime or when the temperatures are warm. If you see a dog or child in a hot car, take down the plate number, make and model of the car and see if the owner can be paged. Call local authorities such as the police to see if they will free the dog or child by opening the car door.