Identify the signs and symptoms of Heat Illness

By Rich Gaul, Safety Technical Advisor

What do constructions workers, school kitchen workers, and the high school students mowing your lawn all have in common? They could potentially be at risk for heat illness, and they should take appropriate precautions.

With the warm summer months fast approaching, employers and their workers must protect themselves from the dangers of heat illness. Although we typically associate heat illness with outdoor work, any worker exposed to hot and humid conditions, whether outdoors or indoors, is at risk of heat illness. And, heat illness is not just a work-related problem. Exertional heat stroke is the second leading cause of death among athletes.

Heat illness occurs when heat builds up in the body faster than the body can cool itself. Heat-related illnesses may include heat rash, heat cramps, heat exhaustion, and heat stroke. Heat stroke is very serious because it requires immediate medical attention and can lead to death if left untreated. The progression of these stages of illness can be gradual or very rapid.

Symptoms of heat illness:

  • Dizziness.
  • Headache.
  • Muscle cramps.
  • Extreme sweating.
  • Fainting.
  • Nausea.
  • Vomiting.
  • Weakness.

If you begin to experience heat-related symptoms, you should:

  • Notify someone you are experiencing heat illness symptoms and have them summon help.
  • Find a cool place to lay down, rest, and elevate your feet.
  • Drink plenty of water to rehydrate.
  • Loosen or remove as much clothing as possible.
  • Place cold wet towels around your neck, under your armpits, and across your chest.
  • Seek medical attention if you do not feel better within 30 minutes.

If you observe someone experiencing symptoms of heat stroke (confusion, slurred speech, seizures, very high body temperature, rapid heart rate, unconsciousness) call 911 immediately. When in doubt, call 911. Heat-related illnesses may appear less severe than they really are.

For additional information about heat illness prevention, attend BWC’s virtual training class on Thermal Stress on June 9, 2021 or read BWC’s Heat Stress Safety Talk. The Occupational Safety and Health Administration’s website provides workers and employers with additional information and resources on heat illnesses and how to prevent it, including heat stress prevention QuickCards available in both English and Spanish. The National Institute for Occupational Safety and Health also has information on preventing heat-related illness at work in its May 7, 2021 blog.

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