Heat Illness Prevention: Working in the Heat: Know the Hazards Brochure (OSHA 4401)

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1. Page 1

   OSHA 4401-02 2024

   • 9-1-1
   • For more information on heat stress, visit www.osha.gov/heat
   • Federal law entitles workers to a safe workplace.
   • For more information, visit www.osha.gov/workers
   • Know the Hazards
   • Working in the Heat:
   • Additional Information
   • Heat Illness
   • Risk Factors for Heat Illness
   • Responding to Heat Illness
2. Page 2

   Know the Hazards

   • OSHA 4401-02 2024
   • 9-1-1
   • For more information on heat stress, visit www.osha.gov/heat
   • Federal law entitles workers to a safe workplace.
   • For more information, visit www.osha.gov/workers
   • Working in the Heat:
   • Additional Information
   • Heat Illness
   • Risk Factors for Heat Illness
   • Responding to Heat Illness
3. Page 3

   Signs of Heat-Related Emergencies

   • Be Alert for Signs of Heat
   • Illness
   • Heat illness can be fatal if not treated quickly.
   • The symptoms of heat illness will intensify with time if actions are not taken to hydrate, rest, and cool down. Take action to avoid a medical emergency.
   • If a worker experiences:
   • Abnormal thinking or behavior Slurred speech
   • Seizures
   • Fainting
   • Heavy sweating or hot, dry skin
   • Take these actions immediately:
   • Call 911 immediately.
   • Cool the worker right away with water or ice.
   • Remove unnecessary clothing and give cool water to drink. Stay with the worker until help arrives.
   • Topics to Include in a Heat Illness Prevention Program
   • Have a prevention plan and designate someone to oversee the program.
   • Provide regular training on heat illness.
   • Acclimatize workers and modify work schedules to reduce heat exposure.
   • Allow frequent rest breaks.
   • Identify heat hazards and check the temperature in the space before work.
   • Monitor for heat illness symptoms.
   • Designate a break area and encourage hydration.
   • Have workers dress for the heat.
   • Be prepared for an emergency.
   • Symptoms of heat illness can include:
   • Headache or nausea
   • Weakness or dizziness
   • Elevated body temperature
   • Thirst
   • Decreased urine output
   • First aid for heat illness:
   • Give cool water to drink.
   • Remove unnecessary clothing.
   • Move to a cooler area.
   • Cool with water, ice, or a fan.
   • Do not leave alone.
   • Seek medical care if needed.
   • Control Heat in the Workplace
   • Assess which controls may be appropriate for your workplace. These could include air conditioning, adding fans to increase air circulation, and insulating hot surfaces. As a reminder, certain personal protective equipment can increase the risk of heat illness. Frequently communicate with workers to ensure they are not experiencing symptoms of heat illness.
4. Page 4

   Signs of Heat-Related Emergencies

   • Be Alert for Signs of Heat
   • Illness
   • Heat illness can be fatal if not treated quickly.
   • The symptoms of heat illness will intensify with time if actions are not taken to hydrate, rest, and cool down. Take action to avoid a medical emergency.
   • If a worker experiences:
   • Abnormal thinking or behavior Slurred speech
   • Seizures
   • Fainting
   • Heavy sweating or hot, dry skin
   • Take these actions immediately:
   • Call 911 immediately.
   • Cool the worker right away with water or ice.
   • Remove unnecessary clothing and give cool water to drink. Stay with the worker until help arrives.
   • Topics to Include in a Heat Illness Prevention Program
   • Have a prevention plan and designate someone to oversee the program.
   • Provide regular training on heat illness.
   • Acclimatize workers and modify work schedules to reduce heat exposure.
   • Allow frequent rest breaks.
   • Identify heat hazards and check the temperature in the space before work.
   • Monitor for heat illness symptoms.
   • Designate a break area and encourage hydration.
   • Have workers dress for the heat.
   • Be prepared for an emergency.
   • Symptoms of heat illness can include:
   • Headache or nausea
   • Weakness or dizziness
   • Elevated body temperature
   • Thirst
   • Decreased urine output
   • First aid for heat illness:
   • Give cool water to drink.
   • Remove unnecessary clothing.
   • Move to a cooler area.
   • Cool with water, ice, or a fan.
   • Do not leave alone.
   • Seek medical care if needed.
   • Control Heat in the Workplace
   • Assess which controls may be appropriate for your workplace. These could include air conditioning, adding fans to increase air circulation, and insulating hot surfaces. As a reminder, certain personal protective equipment can increase the risk of heat illness. Frequently communicate with workers to ensure they are not experiencing symptoms of heat illness.