Many people are exposed to heat on the job, outdoors or in hot indoor
environments. Operations involving high air temperatures, radiant heat
sources, high humidity, direct physical contact with hot objects, or
strenuous physical activities have a high potential for causing
heat-related illness. Workplaces with these conditions may include iron
and steel foundries, nonferrous foundries, brick-firing and ceramic
plants, glass products facilities, rubber products factories, electrical
utilities (particularly boiler rooms), bakeries, confectioneries,
commercial kitchens, laundries, food canneries, chemical plants, mining
sites, smelters, and steam tunnels.
Outdoor operations conducted in hot weather and direct sun, such as
farm work, construction, oil and gas well operations, asbestos removal,
landscaping, emergency response operations, and hazardous waste site
activities, also increase the risk of heat-related illness in exposed
Every year, thousands of workers become sick from occupational heat exposure, and some even die. These illnesses and deaths are preventable.