It makes me sick to my stomach to think of people leaving their pets in the car during this heat. There is no reason to do this. The temperatures in a vehicle will call in animal. It's HORRIBLE!
On a 78-degree day, the temperature inside a parked car can soar to between 100 and 120 degrees in just minutes, and on a 90-degree day, the interior temperature can reach as high as 160 degrees in less than 10 minutes. Why would you keep ANYTHING in a vehicle that long?
Animals can sustain brain damage or even die from heatstroke in just 15 minutes. Beating the heat is extra tough for dogs because they can only cool themselves by panting and by sweating through their paw pads.
If you see a dog left alone in a hot car, take down the car's color, model, make, and license plate number. Have the owner paged in the nearest buildings, or call local humane authorities or police. Have someone keep an eye on the dog. Don't leave the scene until the situation has been resolved.
If the authorities are unresponsive or too slow and the dog's life appears to be in imminent danger, find a witness (or several) who will back up your assessment, take steps to remove the suffering animal from the car, and then wait for authorities to arrive.
Also if it's hot...here are the 2 biggest tips you can use
1) Plenty of fresh, cool water at all times, and 2) Plenty of shade. When the temperature's hot/humid, I change Reb's water about three times a day. I'm never surprised that she'll go for her water dish after she sees I have refilled it. Cooler water is, of course, much more refreshing and thirst-quenching than warm water.
You can also give your dog ice cubes to munch on and a kiddie pool works wonders if your dog is an outside dog..just fill it up and let him cool in it!
You can also go to your local pet store to find cooling items as well..
DONT FORGET ABOUT YOUR DOGS!