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11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
BLR’s Safety Training Presentations
Working in Hot Conditions
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
It’s Gonna Be a Hot One
Shimmering heat waves dance onthe pavement
Your clothing is soaked with sweat You feel dizzy, light-headed, and
sick to your stomach You’re thirsty, but you forgot your
water bottle at home If you’re not careful, you could be
a heat stroke victim
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Goals
Heat-related Illnesses Prevention and Treatment Quiz
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Body’s Cooling System
Blood circulates closer to the skin so heat is lost
Body sends sweat to the skin’s surface Sweat evaporates off the skin, cooling
the body
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Heat Rash
Hot and humid environment—sweat not removed by evaporation
Red, bumpy rash that often itches
Uncomfortable, making sleep difficult Treatment and prevention:
Rest in a cool place Keep your skin dry and clean
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Heat Syncope or Fainting
Worker not acclimated to the hot environment
Worker stands still in the heat
Blood pools in the legs, so less blood goes to the brain
Quick recovery after lying down in cool area Prevent by moving around rather than
standing still
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Heat Cramps
Painful muscle cramps Caused by the loss of your body’s
salt when sweating Treated/prevented by drinking
electrolyte liquids Severe cases require intravenous
saline solutions
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Heat Exhaustion
Loss of fluids and salt Worker feels weak, dizzy, or nauseous Skin clammy and moist, complexion
pale or flushed Treatment: rest in cool place, drink
electrolyte solution Severe cases: victims vomit or lose
consciousness
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Heat Stroke
Worker stops sweating
Symptoms include hot and dry skin
Confusion, convulsions, or loss of consciousness
Keep victim cool and provide fluids
Death without immediate medical attention
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Heat Promotes Accidents
Decreased strength, increased fatigue Reduced comprehension and ability
to retain information Safety procedures not followed Sweaty palms, fogged safety glasses
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Goals
Heat-related Illnesses Prevention and Treatment Quiz
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
The Heat Equation
High Temperature
+ High Humidity
+ Physical Work
= Heat Illness
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Environmental Heat Stress Factors
Temperature Humidity Radiant heat Air velocity
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
At Risk Occupations
Metal foundries, brick-firing plants, glass products facilities, manufacturers of rubber products, electrical utilities, bakeries, commercial kitchens, mining sites, steam tunnels, construction, laundries, food canneries, chemical plants, petro-chemical workers, fire fighters, and asbestos removal.
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Our Sensitivity to Heat
Acclimatization Age Physical condition Overall health Metabolism Use of alcohol or drugs
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Medical Surveillance
Periodic medical evaluation
Determine risk of developing heat-related illness
High-risk employees removed from hot working environments
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Engineering Controls
General ventilation Spot cooling Shielding from radiant heat sources Substitute machinery for manual labor
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Administrative Controls
Schedule heavy work for a cooler time of the year
Do some jobs in the evening or early morning
Enforce breaks with longer rest periods
Allow workers to become conditioned to the heat
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Administrative Controls (cont.)
Reduce the physical demands of workers Use relief workers Limit the number of hours in the hot
work environment Pace the workers
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
PPE
Cool clothing Shade-providing hats Portable water
products Reflective clothing Circulating air
around the body
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Water, Water, Water
Drink water Drink electrolyte-
balanced fluids One cup every
15-20 minutes Avoid caffeine
and alcohol
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Worker Monitoring Programs
Workers with a high risk of heat illness should be monitored
Check the heart rate at the beginning of a rest period
Check the pulse 2.5 minutes after the break starts
Oral temperature at end of work day Body water loss
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Investigate Heat-related Illness
Describe events leading up to the incident Work being done at the time of the incident Length of time employee was working
before incident Engineering and administrative controls Appropriate PPE Medical screening and monitoring by
other employees
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Goals
Heat-related Illnesses Prevention and Treatment Quiz
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Summary
Heat-related illness can kill Know the symptoms and first-aid response Understand at-risk jobs Reduce heat stress with engineering or
administrative controls Drink water, drink water, drink water
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Quiz
1. Heat rash is caused by the sweat not evaporating from your skin. Name the best way to treat and prevent heat rash: ________________________________________
2. The primary cause of heat cramps is the loss of your body’s salt when sweating. True or False
3. Drinking alcohol after a hard day of work in hot conditions will replenish the body’s fluids. True or False
4. __cup(s) of water should be consumed every __ minutes.5. Besides temperature and humidity, name another
environmental factor that contributes to heat stress:_____________________________________________
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Quiz (cont.)
6. Name one of the main symptoms of heat stroke: __________________________________________
7. It usually takes a worker about 4-8 hours to acclimatize to hot working conditions. True or False
8. A worker suffering from heat exhaustion will feel_______ and their skin will be_______.
9. Name engineering controls used by your company: __________________________________________
10. Describe first aid for a heat stroke victim:__________________________________________
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Quiz Answers
1. Treat and prevent heat rash by keeping your skin cool and dry.
2. True.3. False. Drinking alcohol will actually add to
dehydration or the body’s loss of water.4. One cup of water should be consumed every 15-20
minutes.5. Radiant heat and air velocity are other environmental
factors that contribute to heat stress.
11006130/0103 Copyright © 2001 Business & Legal Reports, Inc.
Quiz Answers (cont.)
6. A victim of heat stroke stops sweating and has hot and dry skin.
7. False. A worker usually requires 5-7 days to acclimatize to hot work conditions.
8. Someone suffering from heat exhaustion will feel dizzy, weak, or nauseated, and the skin will be pale or flushed and feel moist and clammy.
9. Engineering controls might include: ventilation, spot cooling, shielding.
10. Immediately call for medical care (i.e., 911), move the victim to a cool or shaded area, remove heavy clothing, cool by fanning, wet clothes/skin, place ice in armpits and groin area.