If you think jobsite productivity slows as the temperature rises, you are right. When environmental temperatures approach normal skin temperature, cooling of the body becomes a problem. COMMON PROBLEMS TO WATCH FOR Potentially fatal, heat stroke causes the victim's skin to be hot, dry, red or spotted. Body temperature is usually 105 degrees or higher, and the victim is mentally confused, delirious or unconscious. Heat cramps are painful spasms of the muscles that occur among those who sweat heavily and drink large quantities of water without replacing the body's salt loss. Cramps may be relieved by taking salted liquids by mouth. PREVENTATIVE MEASURES Short but frequent rest breaks in a cool place can help immeasurably against the effects of extreme heat. Because so many heat disorders involve excessive dehydration, it is essential that water intake during the workday be about equal to the amount of sweat produced. As much as 2 to 3 gallons is not an unusual output.