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150 Physical Health Hazards in Construction
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Temperature Extremes

A change in body temperatures due to extreme work environmental conditions can lead to stress or illness from heat and cold. If not treated in time, both heat and cold stress can develop into life-threatening situations.

  • Heavy work in high temperatures can cause muscle cramps, dehydration, sudden collapse, and unconsciousness.
  • Cold temperatures can lead to fatigue, irregular breathing, confusion, and loss of consciousness (hypothermia).

The table below shows some common heat and cold injuries on a construction site.

Heat Illnesses Cold Illnesses/Injuries
Heat Rash Frost Nip
Fainting Immersion Injury (Trench Foot)
Heat Exhaustion Frostbite
Heat Stroke Hypothermia
Heat Cramps

Knowledge Check Choose the best answer for the question.

2-5. Which of the following can cause muscle cramps, dehydration, sudden collapse, and unconsciousness?