Heat illnesses are avoidable. With knowledge, preparation, fluid replacement and prompt emergency care, there is no need for heat illness to affect people working in warm weather.

Follow these guidelines: Keep as cool as possible, avoid dehydration (drink 8 ounces of water every 20 minutes), wear appropriate clothing, rest frequently, avoid alcohol and caffeine.

Heat-related illnesses

Heat syncope, in which a person becomes dizzy or faints after exposure to high temperatures.

What to do: Lie down in a cool place; if not nauseated, drink water, check for injuries (if victim fell); seek medical attention if there is not a full recovery.

Heat edema causes the feet or ankles to swell from heat exposure. It is more common in women not acclimated to a hot climate. It is related to salt and water retention and tends to disappear after acclimation.

What to do: Wear support stockings; elevate legs.

Heat rash is an itchy rash that develops because of unevaporated moisture on skin wet from sweating.

What to do: Dry and cool the skin.