According to the American Veterinary Medical Association, hundreds of pets die each year as a result of being left in parked cars. This often occurs when pet owners make a stop with the intent of only being gone a few minutes. Many a pet owner has said to themselves, “Oh, there's no need to worry. I won't let anything get me sidetracked.” But the fact is, getting sidetracked or delayed can happen to anyone. Unfortunately, unforeseen circumstances can and do arise, such as having to wait in a long line, running into someone and getting tied up in a conversation, or any number of other scenarios. Not to mention, it takes only a few minutes for a car to heat up to dangerous temperatures.
Many pet owners also believe a car can't get too hot for their pet with the windows cracked open or on a cloudy day. Sadly, these mistaken notions have resulted in countless pet emergencies and deaths.
via Whisker Therapy