Heat stroke is a medical emergency! Most severe form of heat illness when the body overheats cannot cool down by sweating because of dehydration  hot/humid environment. Heatstroke is a condition caused by your body overheating, usually as a result of prolonged exposure to or physical exertion in high temperatures. This most serious form of heat injury, heatstroke can occur if your body temperature rises to 104 f (40 c) or higher. Heatstroke requires emergency treatment. Untreated heatstroke can quickly damage your brain, heart, kidneys and muscles. The damage worsens the longer treatment is delayed, increasing your risk of serious complications or death.  Signs symptoms: Usually starts with signs of heat exhaustion Warm, flushed skin. Very high fever of 41c. Nausea and vomiting. Faintness. Dizziness. Weakness. Headache. Rapid heartbeat. Racing heart rate. Convulsion. Unconsciousness. Risk factors / causes: Dehydration. Working outd