Heatstroke What is it? The most serious heat-related illness. It occurs when the body can no longer control it's temperature when exposed to excessively high temperatures. Symptoms: Fever of 104 degrees Fahrenheit (40 degrees Celsius) or greater Changes in mental status or behavior, such as confusion, agitation and slurred speech Hot, dry skin or heavy sweating Nausea and vomiting Flushed skin Rapid pulse Rapid breathing Headache Fainting Seizure Coma When to Seek Emergency Care: If you suspect heatstroke, call 911 or your local emergency number. Move the person out of the heat right away. Cool the person by whatever means available. For example: Put the person in a cool tub of water or a cool shower. Spray the person with a garden hose. Sponge the person with cool water. Fan the person while misting with cool water. Place ice packs or cool wet towels on the neck, armpits, and groin. Cover the person with cool damp sheets. If the person is conscious, offer chilled water, a sports drink containing electrolytes, or other nonalcoholic beverage without caffeine. Begin CPR if the person loses consciousness and shows no signs of circulation, such as breathing, coughing, or movement.