A lot of athletes exercise in hot weather and sometimes in extreme heat. Signs of heat exhaustion often begin suddenly. The combination of heat, heavy perspiration, and inadequate fluid intake takes away your body's ability to cool itself and your internal temperature starts to rise, sometimes as high as 104°F. What is a safe body temperature? The symptoms resemble the onset of shock: You feel dizzy, nauseated, or worried. You could have a headache and/or a fast heartbeat.
The 8 Biggest Sun...Full Story