The heat is on across the country. Learn how to stay cool -- and safe -- when the mercury rises.
If you are not accustomed to working or exercising in a hot environment, start slowly and pick up the pace gradually. If exertion in the heat makes your heart pound and leaves you gasping for breath, stop all activity. Get into a cool area or at least into the shade, and rest, especially if you become lightheaded, confused, weak or faint.
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