Austria and Germany get very hot. A parked car becomes a trap in the sun. The heat rises fast in the car. At 25 degrees outside, it is 35 degrees inside. After 15 minutes, it is often 45 degrees. The heat even rises to 60 degrees later.
This is life-threatening for children and animals. Never leave someone behind in the car. Do not do it for a short time. Open windows do not help in this heat. A small girl died in a hot car in Germany. Her mother forgot the child in Schorndorf.
If you see a child or animal in a hot car, find the owner quickly. Call the police or the fire department. You can break the window in an emergency. This is allowed if there is a life-threatening situation. People get a punishment if they leave children or animals in a car.
Heat also makes driving dangerous. Many drivers cannot focus well. They get angry fast or make mistakes. Drink a lot of water while driving. Take breaks in the shade often. Silver foil on the window keeps the car cooler.