Always cover your head. Remove wet clothing immediately. It only takes a loss of 10 percent of the body's normal water content to cause serious problems. Drinking lots of water and fluids is the best way to combat this problem. These cramps are caused by a lot of sweating.
Heat cramps are painful muscle spasms in the arms, legs and mid-section.
One must stop activity and drink plenty of water in order to get better. If not, it will lead to heat exhaustion. Exhaustion is caused by excessive fluid loss. Increased sweating, high body temperature, cool wet skin and some lack of coordination are signs of heat exhaustion. Heat stroke is extremely serious and can be fatal.