Topic : Heat Stress
Stay Safe During Summer
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Heat Stress
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HEAT is the flow or transfer of energy from a high
temperature location to low temperature location / object.
GENERATION OF BODY HEAT
There are two main ways in which our bodies produce heat:
Metabolic Heat - The body generates heat through the
digestion of food, work and exercise.
Environmental Heat – the body absorbs heat from the
surrounding environments like hot sun or hot room or hot work activities.
HEAT RELATED HEALTH PROBLEMS
Heat Rash - also known as Prickly Heat occurs in hot, humid
environments where sweat can't easily evaporate from the skin.
Heat Cramps - painful muscle spasms that result from the
loss of salt and electrolytes due to excessive sweating.
Heat Exhaustion - is a state brought on by the loss of
fluids lost during excessive sweating.
Heat Stroke - is a severe medical emergency which could
result in death.
- Heat stroke results when the body's core temperature
gets too high and the able to cool itself.
- An individual suffering from heat stroke will
have hot and dry skin, their pulse high, and their blood pressure will fall.
- This condition must be treated by immediately
cooling the victim's body with wrapping them in cool wet sheets. Immediately
seek medical attention.
PRECAUTIONS
Acclimation - Accustom yourself to the weather prior to long
durations of physical activity.
Maintain Body Fluids - Fluid intake must be maintained
throughout the course of physical activity, at least by taking small sips of
water every thirty minutes.
- Do not rely on thirst as an indicator of
dehydration.
- Alcohol should be avoided because it is a
diuretic, which increases dehydration.
Proper Diet – Eat light and stay away from heavy foods. They
increase metabolic heat production and it increase water loss. Eat smaller,
well-balanced meals more often.
Rest Periods - Pace your work activities at a slower rate
during high temperatures and take frequent rest periods in a shaded area and
drink plenty of fluids.
Dress Light – Lightweight, light-colored cotton clothing
reflects heat and sunlight and helps your body maintain normal temperatures.
Heat-related Illnesses and First Aid
The chart below shows symptoms and first aid measures to
take if a worker shows signs of a heat-related illness.
Illness
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Symptoms
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First Aid
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Heat
stroke
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Confusion
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Fainting
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Seizures
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Excessive sweating or red, hot, dry skin Very
high body temperature
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• Call 102 / 108
While waiting for help:
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Place worker in shady, cool area Loosen
clothing, remove outer clothing
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Cold packs in armpits Wet worker with cool water;
apply ice packs, cool compresses.
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Provide fluids (preferably water) as soon as
possible.
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Heat
exhaustion
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Cool, moist skin
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Heavy sweating
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Headache
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Nausea or vomiting dizziness
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Light headedness
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Weakness
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Thirst
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Irritability
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Fast heart beat
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Have a worker sit or lie down in a cool, shady
area
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Give worker plenty of water to drink
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Cool worker with cold compresses / ice packs
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Take to clinic or emergency room for medical
evaluation or treatment if signs or symptoms worsen or do not improve within
60 minutes.
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Heat
cramps
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Muscle Spasms
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Pain
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Usually in abdomen, arms, or legs
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Have a worker rest in shady, cool area
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Worker should drink water or other cool beverages
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Wait a few hours before allowing worker to
return to strenuous work
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Have worker seek medical attention if cramps
don't go away
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Heat rash
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Clusters of red bumps on skin
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Often appears on neck, upper chest, folds of
skin
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–
Try to work in a cooler, less humid
environment when possible
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Keep the affected area dry
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Remember, if you are not a medical professional, use this
information as a guide only to help workers in need
Jobs that physically demanding – such as heavy lifting or
operating large objects, should be saved for early morning or late evening,
when the temperature is cooler.
Suggested heat work procedures
Temperature
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Danger Category
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Heat Syndrome
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Procedures
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> 130
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Extreme Danger
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Heat Stroke Imminent
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When the heat index is in this zone employees in the affected area should be dismissed.
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105 - 129
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Danger
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Heat Cramps or heat
exhaustion likely. Heat
Stroke possible with
prolonged exposure and
activity
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When the heat index is in this zone. Critical work activities should
be suspended. Non critical work activities shall be evaluated and schedule
the employees with time period.
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91 - 104
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Extreme Caution
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Heat cramps or heat exhaustion possible with prolonged exposure and activity
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When the heat index is in this zone, shall discuss the situation with
supervisors and make schedule/work adjustments to
accommodate for the heat.
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77 - 90
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Caution
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Fatigue Possible
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Normal work day, no alerts posted.
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