heat stress awareness
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HEAT STRESS
WHAT IS IT AND
HOW IT AFFECTS YOU?
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External Factors
Affecting Heat Stress
Air movement
Clothing
Radiant heat ( hot vessels and
sun)
Humidity
Work rate (Mild/ Moderate/Heavy)
If these
not controlled
HEAT STRESS MAY
OCCUR!!!
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Effects of Heat stress on your
body
Prickly heat (skin rash) Muscle Cramps (pain and
tension in muscles)
Exhaustion (feeling weak) Syncope (fainting)
Heat Stroke (life threatening!)
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Heat Cramps
Your body is telling you toslow down!
You Feel:
Moist coolpale skin
Nauseated
Tired Muscle
twitching
Painful
muscle
cramps
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Heat Exhaustion
your body is starting toloose the battle!
You Feel:
Heavy sweatingWeak and fatigued
Headache and dizzy
Nauseated Rapidly breathing
Intense thirst
Vomiting
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Heat StrokeLife threatening!
(The body can no longer regulateits own temperature!)
Hot red skin
NO sweating Rapid pulse
Difficulty inbreathing
Confusion
Vomiting
Coma
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Risk Factors
Dehydration,
Lack of acclimatization, (from
cool climate)
Unfit,
Lack of sleep,
Tea/ Coffee and
alcohol consumption, Cold / Flu / medical
condition,
Some medications and drugs.
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Prevention
Start drinking water
( before you start work),
Drink water
( As much as you need),
Check your Urine colour
(note the urine color),
Ensure adequate ventilation,
Rotate work
( from hot to cool areas),Report to your Supervisor or the
Nurse at first sign of any problem,
Keep an eye on
your work mates
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Warning!
You need to learn to drink, even
when you are not thirsty.By the time you feel thirsty you are
already 10% dehydrated
Urine colour gives indication of
hydration state ie,(if urine is dark drink more)
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Heat Exposure
Work Load / WBGTWork / Rest Period
(Each Hour)
Light Medium Heavy
30 26.7 25 Continuous Work
30.6 28 25.9 45 Min. Work / 15 Min. Rest
31.4 29.4 27.9 30 Min. Work / 30 Min. Rest
32.2 31.1 30 15 Min. Work / 45 Min. Rest
Light Work= In shade, with out Air Conditioner with
minimum movements. Example Office Work, Fabricators in
Fabrication Shops etc..
Medium Work= Under Direct Sun, but minimum movement.
Example Steel Fixer, Welders etc..
Heavy Work= Under Direct Sun with maximum movements.
Example Scaffolding, Manual Handling etc.
REFERENCE
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Work / Rest Period
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PREVENTION
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PREVENTION
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The color of Urine tells you
how dehydrated you are!
Extremely Dehydrate
Drink Water Immediately
Mildly Dehydrated
Drink More Water
Not Dehydrated