The National Safety Council recommends that people who are working outside in hot weather or in non-air-conditioned environments should cool down with wet scarves around their necks. As the moisture evaporates, the body stays cooler.
Drinking enough water is very important. You can alternate water with a sports drink that contains electrolytes. The key is to drink enough so you never get thirsty. If your urine is concentrated — a dark color — you need to drink more. Drink enough water so your urine is pale yellow.
When you are working outside, be sure to wear a hat and a lightweight, long-sleeved shirt with no T-shirt underneath.
Remember that caffeine and alcohol are dehydrating. Drink decaffeinated beverages, bottled water or sports drinks.