Heat stress
When the body is unable to cool itself by sweating, several heat-induced illnesses such as heat stress or heat exhaustion and the more severe heat stroke can occur, and can result in death.
Factors leading to heat stress
- High temperature and humidity
- Direct sun or heat
- Limited air movement
- Physical exertion
- Poor physical condition
- Some medicines
- Inadequate tolerance for hot workplaces
Symptoms of heat exhaustion
- Headaches, dizziness, lightheadedness or fainting
- Weakness and moist skin
- Mood changes such as irritability or confusion
- Upset stomach or vomiting
Symptoms of heat stroke
- Dry, hot skin with no sweating
- Mental confusion or losing consciousness
- Seizures or convulsions
Preventing heat stress
- Know signs/symptoms of heat-related illnesses; monitor yourself and coworkers
- Block out direct sun or other heat sources
- Use cooling fans/air-conditioning; rest regularly
- Drink lots of water; about one cup every 15 minutes
- Wear lightweight, light colored, loose-fitting clothes
- Avoid alcohol, caffeinated drinks, or heavy meals
What to do for heat-related illness
- Call 911 (or local emergency number) at once
While waiting for help to arrive:
- Move the worker to a cool, shaded area
- Loosen or remove heavy clothing
- Provide cool drinking water
- Fan and mist the person with water
Source: U.S. Dept. of Labor
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LC OCT 2018 08-72
171-0988 (2/14)