What role does humidity play in how our bodies regulate temperature?

Question

A common response hearing that the temperature in New Mexico is 105°F is, "It's not that bad; it's a dry heat", whereas at the same time, the summers in Atlanta, Georgia are the characterized as dreadful even though the air temperature lower . What role does humidity play in how our bodies regulate temperature?

Answer 1

Sweat evaporating from the skin removes heat from the body. In a humid environment, more water in the air means less evaporation off the body.