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Heat Stress - PowerPoint PPT Presentation


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Heat Stress. Hot work environments. Outdoor work in hot weather Foundry work Smelting Brick-firing, ceramics, or glass manufacture. 1a. Hot work environments. Rubber manufacture Work in bakeries, confectioneries, kitchens Laundry operations. 1b. Risk factors.

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hot work environments
Hot work environments
  • Outdoor work in hot weather
  • Foundry work
  • Smelting
  • Brick-firing, ceramics, or glass manufacture

1a

hot work environments1
Hot work environments
  • Rubber manufacture
  • Work in bakeries, confectioneries, kitchens
  • Laundry operations

1b

risk factors
Risk factors
  • Not everyone is affected equally
    • Age, weight, physical fitness
    • Metabolism, medications, use of alcohol/drugs
  • Air temperature

2a

risk factors1
Risk factors
  • Humidity
  • Direct sun
  • Radiant heat sources
  • Clothing

2b

how heat causes fatigue
How heat causes fatigue
  • Blood circulates to upper layers of skin
  • Less blood is available to provide energy to active muscles, brain, internal organs

3a

how heat causes fatigue1
How heat causes fatigue
  • Performance, coordination, alertness all decline
  • Gradually adjust to working in hot conditions

3b

heat rash
Heat rash
  • Results from body’s natural cooling mechanisms
  • Body heat is released through sweating
  • If sweat ducts become plugged, a rash can develop

4a

heat rash1
Heat rash
  • Rash is very uncomfortable, can become infected
  • Rest in a cool area
  • Bathe and dry the skin ASAP

4b

fainting
Fainting
  • Fainting can be a reaction to the heat
  • As blood is circulated to extremities, it can accumulate in the lower part of the body

5a

fainting1
Fainting
  • Fainting can occur if the brain does not get enough blood
  • Lie down in a cool area

5b

muscle cramps
Muscle cramps
  • Occur in tired muscles when worker sweats profusely and drinks large amounts of water
  • Sweating removes salt from the body
  • Drinking dilutes body fluids

6a

muscle cramps1
Muscle cramps
  • Low salt levels can cause painful spasms
  • Too much salt can also cause cramps
  • Drink 5 to 7 ounces of water every 15 to 20 minutes

6b

muscle cramps2
Muscle cramps
  • Thirst is not a reliable indicator of the need for water in a hot environment
  • Avoid drinking beverages containing caffeine or alcohol

6c

heat exhaustion
Heat exhaustion
  • Results when a person has lost large amounts of fluid by sweating

7a

heat exhaustion1
Heat exhaustion
  • Symptoms resemble early heat stroke
    • Fatigued
    • Giddy
    • Nauseous
    • Headache

7b

heat exhaustion2
Heat exhaustion
  • Person sweats
  • Skin is clammy and moist
  • Body temperature remains at or near normal

7c

heat exhaustion3
Heat exhaustion
  • Victim may vomit/lose consciousness in extreme cases
  • Move victim to cool place and give plenty of liquids

7d

heat stroke
Heat stroke
  • Life-threatening condition
  • Occurs when body’s temperature regulatory system fails
  • Sweating becomes inadequate to remove excess heat

8a

heat stroke1
Heat stroke
  • Skin is hot and dry
  • Body temperature is 105 degrees F or higher
  • Victim is mentally confused or delirious

8b

heat stroke2
Heat stroke
  • Victim may have convulsions or become unconscious
  • Get immediate medical attention
  • Move victim to cool area

8c

heat stroke3
Heat stroke
  • Soak clothing in water
  • Fan the body
  • Never leave unattended

8d

measuring evaluating heat exposures
Measuring/evaluating heat exposures
  • Heat index system
  • Health and safety agency testing

9a

measuring evaluating heat exposures1
Measuring/evaluating heat exposures
  • Work classifications:
    • Light hand work
    • Heavy hand work
    • Heavy work with one arm
    • Light work with two arms
    • Moderate work with the body
    • Heavy work with the body

9b

controlling heat stress
Controlling heat stress
  • Engineering controls
  • Work practice controls
  • PPE

10a

controlling heat stress1
Controlling heat stress
  • Take intermittent rest periods with water breaks
  • Use relief workers
  • Pace the work

10b

controlling heat stress2
Controlling heat stress
  • Reduce physical demands
  • Use cool recovery or rest areas
  • Schedule work for cooler times of day

10c