What type of severe weather prevents sweat from evaporating to cool down bodies?

A humid weather prevents sweat from evaporating to cool down bodies.

Explanation:

Evaporation of sweat helps the body in cooling down. This is because when the 'sweat is evaporated', the body loses heat. When there is a lot of moisture in the air and the capacity of air to carry moisture is already saturated, the evaporation of the sweat halts and thus, the body loses less heat. In such a condition, the process of sweating continues ceaselessly and causes the body to lose more fluid.

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