👉 Hyperpyrexia, also known as sunstroke or sunstroke, is a condition characterized by severe heat exhaustion and dehydration. It occurs when someone experiences excessive heat exposure for an extended period of time. The symptoms can include intense abdominal pain, fever, chills, nausea, and sweating. Hyperpyrexia is often accompanied by other signs such as rapid heartbeat, dizziness, or confusion. In severe cases, it can lead to death if left untreated.