What is one of the key factors that differentiate heat stroke from heat exhaustion?

One of the key factors that differentiates heat stroke from heat exhaustion is a high core temperature. In cases of heat stroke, the body's core temperature can rise significantly, typically above 104°F (40°C), and it becomes a life-threatening condition. This hyperthermia occurs because the body's thermoregulatory system fails, leading to an inability to cool down through normal mechanisms like sweating.

In contrast, heat exhaustion usually presents at lower core temperatures, often resulting from prolonged exposure to heat, excessive sweating, and dehydration. While individuals suffering from heat exhaustion may experience symptoms such as weakness, dizziness, and nausea, they do not reach the critical level of hyperthermia associated with heat stroke, where the body's thermoregulation fails completely. Recognizing this high core temperature as a defining characteristic is vital for timely and effective treatment.