Heatstroke is a deadly disease that can kill your beloved companion, even with emergency treatment. The best way to avoid this terrible situation is prevention, and it's all up to you.
Sun + humidity = heatstroke
The temperature in a car can soar to over 117f when the temperature outside is just 72f, within an hour.
Don't forget, if the temp outside is only 70 with a hot sun, the heat in the car is well over 100.
Your dog's normal body temperature is 100.5 to 102.5 degrees Fahrenheit. If it rises to 105 or 106 degrees, the dog is at risk for developing heat exhaustion. If the body temperature rises to 107 degrees, your dog has entered the dangerous zone of heat stroke. With heat stroke, irreversible damage and death can occur.
Temperatures in a car after the air-conditioner has been turned off will match outside temperatures within 5 minutes.
Humidity interferes with animals' ability to rid themselves of excess body heat. When we overheat we sweat, and when the sweat dries it takes excess heat with it. Our four-legged friends only perspire around their paws, which is not enough to cool the body. To rid themselves of excess heat, animals pant.
Leaving the window open a crack or leaving some water will make little difference and still leaves the dog susceptible to heat stroke which can be fatal. Cracking the windows doesn't cut it!
Your dog can injury himself while moving throughout the car. A simple slip of the leg between your seat and consol can cause a break if your dog is stressed.
Of course its pretty much common sense but I find it amazing how every year dogs die because of the thoughtless actions of their owners.
If Fido can't come with you when you get out of the car, leave him at home.