This video was captured in front of the Panera Bread in Barracks Road Shopping Center, Charlottesville, VA.
Granted, the windows were cracked. But as the chart at the bottom of this page shows, my estimation that it was about 75 degrees at 9:30am on this date was pretty accurate. As I note on the video, during the course of observing this dog for about 20 minutes, I called 911 twice. According to scientific research, the interior temperature rose to about 105 degrees.
By the time the police officer arrived, the truck was gone.