What is the first sign of heat stroke?

The first sign of heat stroke is high body temperature. Heat stroke occurs when the body becomes unable to regulate its temperature, leading to a rapid increase in core body temperature, usually defined as being above 104°F (40°C). As the body overheats, it can suffer from severe physiological stress and damage. Recognizing high body temperature early is crucial for prompt treatment to prevent serious complications or even death.

In the context of heat-related illnesses, while increased sweating, headache, and confusion can occur as heat-related conditions progress, they are typically symptoms that manifest after the initial issue of elevated body temperature. Hence, monitoring core temperature is key to identifying and responding to heat stroke effectively.