1. Never leave pets in vehicles or in direct sunlight during warm, sunny days - even a few minutes can be dangerous.
2. A car standing in the sun, even with windows fully open, will very quickly cause heatstroke in animals.
3. When the outside air temperature is 25ºC.
4. Car can go to 45ºC within, causing severe problems for any animal in it.
5. If you have to leave an animal in a car for short periods, provide them with plenty of cool water to drink and do not muzzle them.