In a warm environment, especially when physically active, the human body relies on its ability to get rid of excess heat (i.e., heat dissipation) to maintain a healthy internal body temperature. Heat dissipation happens naturally through sweating and increased blood flow to the skin. People cool down more rapidly if the external (environmental) heat and physical activity (metabolic heat) are reduced.

If heat dissipation does not happen quickly enough, the internal body temperature keeps rising and the worker may experience symptoms that include thirst, irritability, a rash, cramping, heat exhaustion, or heat stroke. For additional information on how to avoid heat-related injuries, please see the Heat Stress Training (SAF500), available in the Talent Learning Center (TLC).

Updated 9/13/24