Which of the following are risk factors for heat stress in the workplace?

• A. Climatic conditions
• B. High work demands
• C. Protective clothing requirements
• D. All of the above

Answer: (D)

Heat stress risk rises when the body’s heat load increases and cooling ability is limited. Climatic conditions like hot temperatures, high humidity, and radiant heat from surrounding surfaces or equipment raise the amount of heat the body must manage and make sweat evaporation less effective, which boosts the risk. When work demands are high, the body generates more internal heat through metabolic activity, adding to the overall heat load. Protective clothing or PPE can add insulation and trap moisture, reducing heat loss through convection and evaporation. Put together, these factors amplify each other, making heat stress more likely. That’s why all of the above is the best answer.