Another means of prevention is recognition of the problem. A variety of heat stress measures have been proposed to help individuals recognize when they might be at risk for heat-related illnesses. Ultimately, the supervisor, foreman, or someone monitoring the heat and humidity must realize that the conditions may be above human tolerance. Whether or not a person can recognize these conditions depends on a variety of factors including the perception of heat. Studies have shown that heat perception is far from a perfect system. In a study on trained and untrained individuals, it was found that while untrained individuals were able to perceive heat stress fairly closely to measured parameters, trained individuals underestimated the heat stress on their bodies. Thus while training may overall improve heat stress, it may also prevent appropriate recognition (15).

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