OVERVIEW Definitions Hyperthermia is when core temperature exceeds that normally maintained by homeostatic mechanisms Fever or pyrexia is an elevation of body temperature above the normal range of 36.5–37.5 °C (97.7–99.5 °F) due to an increase in the temperature regulatory set point Uncontrolled hyperthermia differs from fever in that the body temperature is elevated above the thermoregulatory set point due to […] Hyperthermia is a medical term for high body temperature, which can be caused by heat stroke, heat exhaustion, heat cramps or heat rash. Learn how to prevent, recognize and treat hyperthermia and its complications. Hyperthermia is a serious condition that requires prompt recognition and treatment. Understanding its causes, symptoms, risk factors, and preventive measures can help mitigate the risk and ensure timely intervention. Hyperthermia is a condition in which the body temperature increases abnormally. Read the article below to learn more about hyperthermia .