Many pets can’t release heat by sweating the way humans do. Dogs pant, while cats lick themselves to regulate their body temperatures.
Make sure you know the signs of heat exhaustion. Very young and very old dogs are usually at higher risk.
According to the Humane Society, if your pet is suffering from a heatstroke you should move him or her into the shade or air conditioned area, then apply cold towels or icepacks to their head, neck and chest. Make sure they drink small amounts of cool water or lick ice cubs, then take him/her directly to the veterinarian.