Hot air is a phenomenon that does not evaporate sweat more than usual so make the heat away from the body. Result in the stifling heat, until the system metadata permeate anabolic in body fails to life.
Hot weather phenomenon is more common. Sweat does not evaporate It takes the heat out of the body is not. The system's hot and metabolism in the body has failed to cause death.
The phenomenon of hot air than usual, non-volatile sweat from the body, so take the heat. Resulting in a metabolic system whice until the body failed to death.