In extreme heat, electric fans may offer some relief when it's very humid, ...
In extreme heat, electric fans may offer some relief when it’s very humid, but when temps are dangerously high and humidity is low, fans can actually make a person feel hotter, increasing strain on the heart and raising core temperature, a new report warns.
Jay added, “In very-hot dry conditions the HI was relatively lower, yet fans were detrimental; but in hot-humid conditions the HI was relatively higher and fans were beneficial.” The men were asked to sit in a climatic chamber that simulated either very hot, dry conditions or hot, humid conditions. The heat index for the humid runs was higher than for the arid runs even though the temperature was lower in the humid condition.
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