Heatstroke in dogs is a serious condition that requires immediate attention. Signs of heatstroke in dogs include excessive panting, drooling, rapid heartbeat, red gums, vomiting, diarrhea, and even collapse. If you suspect your dog has heatstroke, move them to a cool, shaded area immediately. Offer small amounts of water to drink and use cool (not cold) water to wet their fur and skin. Do not use ice-cold water as it can constrict blood vessels and hinder cooling. Place a cool, wet towel over your dog's back and head. It's crucial to lower your dog's body temperature gradually. Contact your veterinarian right away as heatstroke can be life-threatening. While waiting for help, monitor your dog's temperature and try to keep it below 103°F (39.4°C).

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Topics covered in this question:

Dog Care Pet Health Heatstroke Emergency Heat Safety