Summer is a time for both you and your pet to enjoy the sunshine and outdoors, but along with the fun, The HSUS wants to remind pet owners to keep their pets cool during these summer months.
Never leave your pets in a parked car. On a warm day, temperatures inside a vehicle can rise rapidly to dangerous levels. On an 85 degree day, for example, the temperature inside a car with the windows opened slightly can reach 102 degrees within ten minutes. After 30 minutes, the temperature will reach 120 degrees.
Shade and water are a must. Anytime your pet is outside, make sure he or she has protection from heat and sun (a doghouse does not provide relief from heat) and plenty of fresh, cool water. Heat stroke can be fatal for pets as well as people.
Limit exercise on hot days. Take care when exercising your pet. Adjust intensity and duration of exercise in accordance with the temperature. On very hot days, limit exercise to early morning or evening hours, and be especially careful with pets with white-colored ears who are more susceptible to skin cancer, and short-nosed pets. Asphalt gets very hot and can burn your pet's paws.
Recognize the signs of heatstroke. In case of an emergency, it's important to be able to identify the symptoms of heat stress caused by exposure to extreme temperatures. When in doubt, contact your veterinarian immediately. Some signs of heatstroke are: heavy panting, glazed eyes, a rapid heartbeat, restlessness, excessive thirst, lethargy, fever, dizziness, lack of coordination, profuse salivation, vomiting, a deep red or purple tongue, and unconsciousness. If the animal shows symptoms of heatstroke, take steps immediately to gradually lower her body temperature and contact your veterinarian as soon as possible.
Follow these tips, and it could save her life:

Move the animal into the shade or an air-conditioned area.

Apply ice packs or cold towels to her head, neck and chest or run cool (not cold) water over her.

Let her drink small amounts of cool water or lick ice cubes.

Take her directly to a veterinarian.