Siriasis is a condition that is characterized by extreme heat exhaustion or sunstroke. It is a serious medical emergency that can lead to dehydration, heat cramps, and even organ failure if left untreated. Some synonyms for siriasis include heatstroke, hyperthermia, heat exhaustion, sunstroke, and thermic fever. Symptoms of siriasis may include dizziness, headache, nausea, rapid heartbeat, and confusion. Treatment for siriasis typically involves cooling the body down, hydration, and medical attention to prevent complications. Prevention of siriasis includes staying hydrated, avoiding prolonged sun exposure, and seeking shade or air conditioning during hot weather.