Hyperthermia is a condition in which an individuals body temperature is elevated beyond normal due to failed thermoregulation. It occurs when the body absorbs or generates more heat than it can release, and can be caused by several factors such as physical exertion in hot, humid weather, dehydration, use of certain medications, and excessive alcohol use. Hyperthermia can range from mild (heat cramps or heat exhaustion) to severe (heatstroke), which is the most serious form and can be life-threatening. Symptoms of hyperthermia include high body temperature, headache, nausea, dizziness, confusion, and rapid heartbeat. People at the highest risk for hyperthermia include infants, the elderly, athletes, and people with strenuous outdoor occupations. Treatment for hyperthermia involves cooling the body down, which can be done through various techniques such as removing excess clothing, applying cool water to the skin, and using fans or air conditioning. Severe cases of hyperthermia may require hospitalization and intravenous fluids.