If a car can do this in the summer:
Why would anyone want to leave their dog in there?
(Random internet photo)
If you see a dog in a car on a hot day in possible distress, please call the police. You might be saving a life.
Update: Unfortunately, hours after this was posted, a couple left their dog in their car while they went shopping at Vaughan Mills mall. The dog died:
2 people charged after dog dies inside parked car
Dog dies in hot car at Vaughan Mills mall parking lot
Dog found locked in hot car at Sherway Gardens mall