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645 Heat Injury and Illness Prevention: Employee Skip to main content

Risk Factors for Heat-Related Illness

Environmental Factors

Environmental factors contribute significantly to the risk of heat-related illnesses.

These include:

  • High Temperatures: Extremely hot weather increases the risk of heat stress by raising body temperature.
  • High Humidity: Humid conditions make it harder for sweat to evaporate, reducing the body’s ability to cool down effectively.
  • Direct Sun Exposure: Working under direct sunlight increases the body's heat load, making it harder to maintain a safe temperature.
  • Lack of Air Movement: Stagnant air prevents sweat from evaporating efficiently, leading to higher body temperatures and increased risk of heat stress.

To reduce the risks of heat-related illnesses, it's important to seek shade, use fans to improve airflow, and take regular breaks in cooler areas.

Knowledge Check Choose the best answer for the question.

2-6. How does high humidity contribute to heat-related illnesses?