Why is humid heat so much more unbearable than dry heat?
In: Biology
Because humans have evolved with one of their main methods of cooling being the ability to sweat, which works when sweat is allowed to evaporate. When water evaporates, it takes a lot of heat energy to convert liquid water to water vapor, and that cools people. However, the higher the humidity, the less sweat gets converted to water vapor, so you lose the ability to cool through sweating.
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