Breathing issues, weakness or confusion, pale, gray or dry gums, vomiting and/or diarrhea, seizures are all signs of potential heat stroke. If you suspect your dog is suffering a heat stoke, immediate cooling treatment could save his or her life. Use tepid or cool water to submerge the dog's body. Do not use ice cold water, as this can cause circulation problems for the dog. If you can't get the dog in a tub or pool of water, use a water hose and let the water run continuously in the groin area. There are many blood vessels close to the surface in the groin, and this will be most effective in cooling your dog. If you have any cold packs, such as those in drink coolers, apply them to the dog in either the groin area or "armpits".
Use a fan to help speed the evaporation of heat from the dog's body. Do not apply wet towels to the dog; they only serve to trap the body heat. If you have a cooling dog bed or pad, use it underneath the dog. Don’t try to get the dog to drink water once a heat stroke is occurring. You need to get the body temp down and get to the vet as quickly as possible. Take the dog to the veterinarian or an emergency veterinary clinic immediately, once the body temperature begins to reduce. Any delay could be fatal.