At what body temperature is heat stress likely to occur?

Heat stress is a significant concern for physical performance and well-being, particularly in demanding situations. The body naturally maintains a core temperature around 98.6 degrees Fahrenheit under normal conditions. However, when the core temperature rises to around 105 degrees Fahrenheit, it indicates a serious risk of heat-related illnesses. This level of temperature can impair the body's ability to regulate heat effectively, leading to conditions like heat exhaustion or heat stroke, which can be life-threatening.

At temperatures above 105 degrees Fahrenheit, the risk of heat stress dramatically increases because the body's mechanisms for cooling down (perspiration and blood flow to the skin) begin to fail. The higher the temperature, the greater the strain on the body's systems, which may lead to confusion, fainting, and potentially fatal outcomes if not addressed promptly.

Understanding these thresholds is crucial for professionals working in environments where heat stress is a risk, enabling them to take appropriate precautions for health and safety.