Evaporation happens when liquid water evaporates, or converts into vapor (gas).
When water evaporates off the surfaces of organisms, a cooling effect can occur
Your body makes use of the evaporative process when sweating. Sweat, which consists of 90 percent water, starts to evaporate. When the water turns to vapor, the heat energy in the water gets transferred to the air.
This results in a cooling effect (called evaporative cooling) that helps to maintain body temperature and cools the body down when it gets too hot