Schedule Outdoor Activities Carefully
If you must be outdoors, try to limit your outdoor activity to morning
and evening hours. Try to rest often in shady areas so that your body's
thermostat will have a chance to recover.
Pace Yourself
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.