![]() ![]() Metabolic heat, generated by the body, is related to workload (physical activity).Environmental heat is produced by warm or hot surroundings.Two heat sources contribute to the risk of heat-related illness. Heat-related illness prevention starts by determining if a heat hazard is present in the workplace. You should consider the above factors when evaluating heat stress risk to workers. Common values given for categories of work are included in the table on Workload. Workload considerations are described at length in the OSHA Technical Manual. Use of clothing or protective gear that can reduce the body’s ability to lose excess heat.Level of physical activity, i.e., the workload leading to body heat production.Presence of heat sources (e.g., hot tar ovens or furnaces) in the work area.Environmental conditions (such as air temperature, humidity, sunlight, and air speed), especially on sequential days.There are many factors that have a role in creating an occupational heat stress risk to workers.
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