Heat stroke is a serious, potentially life-threatening condition caused by your body overheating, usually as a result of prolonged exposure to or physical exertion in high temperatures. This is the most severe form of heat injury and requires immediate medical attention. Symptoms of Heat Stroke High body temperature: A core body temperature of 104°F (40°C) or higher, obtained with a rectal thermometer, is the main sign of heat stroke. Altered mental state or behavior: Confusion, agitation, slurred speech, irritability, delirium, seizures, and coma can all result from heat stroke. Alteration in sweating: In heat stroke brought on by hot weather, your skin will feel hot and dry to the touch. However, in heat stroke brought on by strenuous exercise, your skin may feel moist. Nausea and vomiting: You may feel sick to your stomach or vomit. Flushed skin: Your skin may turn red as your body temperature increases. Rapid breathing: Your breathing may become rapid and shallow. Racing heart...