Heat safety measures can help prevent or decrease the risk of a heat-related illness. These measures include:

• Acclimating to the heat by gradually increasing your exposure to physical activity in the heat. It may take 10 to 14 days to become acclimated.
• Being well-hydrated by drinking plenty of water before, during, and after you are active. This is very important when it's hot out and when you do intense exercise. Drink 8 fl oz (250 mL) of water before being active in the heat. Continue to drink moderate amounts of fluid every 15 to 20 minutes during the activity.
• Wearing clothing that is light-colored, lightweight, single-layered, and absorbent, allowing your body's sweat to evaporate.