Heat stress creates many hazards in the workplace for those employees who have to work in a hot environment. Hot environments can create indirect safety hazards such as causing employees to lose focus on their work task or becoming fatigued. Heat stress also causes more direct illnesses such as heat cramps, heat exhaustion, and heat stroke.
According to a report published by the CDC, during 2004–2018, an average of 702 heat-related deaths (415 with heat as the underlying cause and 287 as a contributing cause) occurred in the United States annually.
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