In warm, sunny weather cars become ovens and even if it’s cloudy, the temperature inside a car can become dangerously hot for a dog. When it is just 22°C outside, the temperature inside a car can soar to 47°C or even higher. Leaving the car windows open or putting a bowl of water inside does not help.
Dogs can die from heatstroke in as little as 20 minutes.
Source: The dangers of leaving a dog in a car on a warm day @ RSPCA
image by Josch13 under CC0 license
