[WATCH]: Heat Stress Research 1950s

Heat can kill workers if precautions are not taken. This clip was taken from a 1950s newsreel as early research into heat stress was just beginning. Four environmental factors affect the amount of stress a worker faces in a hot work area: temperature, humidity, radiant heat (such as from the sun or a furnace) and wind speed. Individuals with high blood pressure or some heart conditions and people who take water pills may be more sensitive to heat exposure. The body defends itself from

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