Heat Illness

When the body is unable to cool itself by sweating, several heat-induced illnesses such as heat stress or heat exhaustion and more severe heat stroke can occur. All are serious conditions and should be treated immediately.

Factors Leading to Heat Stress

  1. High temperature and humidity
  2. Direct sun or heat
  3. Limited air movement
  4. Physical exertion
  5. Poor physical condition
  6. Some medicines
  7. Inadequate acclimatization to work in hot area

Symptoms of Heat Exhaustion

  1. Headaches, dizziness, lightheadedness, fainting
  2. Weakness and moist skin
  3. Mood changes such as irritability and confusion
  4. Upset stomach or vomiting

Symptoms of Heat Stroke

  1. Dry, hot skin with no sweating
  2. Mental confusion of losing consciousness
  3. Seizures or convulsions

Preventing Heat Stress

  1. Know signs/symptoms – monitor yourself and watch for symptoms in coworkers.
  2. Block direct sun or other heat sources with EZ-Ups or other shelters or shade, and take frequent advantage of any shade.
  3. Use cooling fans/air conditioning where possible.
  4. Rest regularly.
  5. Drink plenty of water – about 1 cup every 15 minutes.
  6. Wear lightweight, light-colored, loose-fitting clothes and broad-brimmed hats.
  7. Avoid alcohol, caffeinated drinks and heavy meals.

What to Do for Heat-Related Illness

  1. Call local emergency personnel (911) immediately.
  2. While waiting for help to arrive:
  3. Move the worker to a cool, shady area.
  4. Loosen or remove heavy clothing.
  5. Provide cool drinking water.
  6. Fan and mist the person with water.


For more complete information, contact your Production Safety Representative.