One of the best ways to reduce heat stress on workers is to minimize heat in the workplace. But there are some work environments where heat production is difficult to control, such as when furnaces or sources of steam or water are present in the work area or when the workplace itself is outdoors and exposed to varying warm weather conditions.

Humans are, to a large extent, capable of adjusting to the heat. This adjustment to heat, under normal circumstances, usually takes about five to seven days, during which time the body undergoes a series of changes that make continued exposure to heat more endurable.