in normal environmental conditions when you sweat, that sweat evaporates off your body like it s doing to this gentleman here. that effectively cools your skin off. but in a high humidity environment, that sweat cannot evaporate properly. because of that, it means that that sweat stays on your skin, making it feel as though you re wearing an extra layer of clothes. no one wants to wear a sweater playing sports in the summer. humidity very important. what other elements do we consider? heat index measures temperature as well as the humidity but there are other things to factor. kwh when was the last time you saw an entire practice done in the shade? never. wet globe temperature takes into count the sun, cloud, and more details. what can you do love to help prevent heat stroke and other heat-related illnesses in the summertime? wear loogs-fse-fitting, light wt