Do you know that it only takes 6 minutes or less for your pet to suffer and succumb to severe heat exhaustion and die. Never leave your dog unattended in a vehicle. Pets can still overheat when the windows are down or even when the car is parked in the shade.
Remember a 29 degree day with your air con set at 20 degrees cooled car, it will take only 10 minutes for the temperature in the car to reach more than 44 degrees. In 20 minutes the temperature would have doubled to a deadly 60 degrees.