How does high humidity contribute to the severity of heat intolerance?
Answer
It limits the effectiveness of evaporative cooling from sweating
Sweating is a critical mechanism for cooling the body, but its efficiency relies heavily on the environment's ability to absorb that moisture. In high-humidity conditions, the air is already saturated with water vapor, which significantly hinders the evaporation of sweat from the skin. Since evaporative cooling provides the most substantial reduction in body temperature, its failure in humid conditions makes the environment feel much hotter. This is why individuals who already have difficulty managing heat find humid weather particularly distressing.
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