Which of the following indicates a critical sign of heat stroke?

A critical sign of heat stroke is a dangerously elevated core body temperature, typically above 40°C (104°F). Heat stroke is a severe heat illness that occurs when the body's temperature regulation fails, often due to prolonged exposure to high temperatures combined with physical exertion. At this elevated temperature, the risk of cellular damage, organ failure, and even death increases significantly.

Recognizing this sign is vital for immediate intervention and treatment, which generally includes rapid cooling of the individual to prevent serious complications. Other indicators, such as altered mental status or the absence of sweating, may also be present, further distinguishing heat stroke from less severe heat-related conditions. Understanding the significance of a dangerously high body temperature is crucial for wilderness responders, as it guides the prompt and effective management of this life-threatening condition.