Which statement about heat stress risk factors is accurate?

Which statement about heat stress risk factors is accurate?

• A. Wearing chemical-resistant PPE increases heat stress risk
• B. Applying pesticides at night increases heat stress risk
• C. Stopping work when feeling hot reduces risk
• D. Hydration eliminates heat stress risk

Answer: (A)

Heat stress risk grows when gear blocks the body’s ability to shed heat. Chemical-resistant PPE is often designed to keep chemicals out, which can make the suit impermeable or only lightly breathable. That extra insulation traps heat and moisture, reducing sweat evaporation and limiting heat loss through convection. In hot, humid conditions, this means the body heats up more quickly, increasing the chance of heat-related illness. So, wearing chemical-resistant PPE increases heat stress risk because it hinders cooling mechanisms. Applying pesticides at night tends to lower risk due to cooler temperatures, so it doesn’t increase risk. Stopping work when you feel hot is a prudent safety action to reduce risk, and hydration helps but doesn’t completely eliminate risk.

Heat stress risk grows when gear blocks the body’s ability to shed heat. Chemical-resistant PPE is often designed to keep chemicals out, which can make the suit impermeable or only lightly breathable. That extra insulation traps heat and moisture, reducing sweat evaporation and limiting heat loss through convection. In hot, humid conditions, this means the body heats up more quickly, increasing the chance of heat-related illness.

So, wearing chemical-resistant PPE increases heat stress risk because it hinders cooling mechanisms. Applying pesticides at night tends to lower risk due to cooler temperatures, so it doesn’t increase risk. Stopping work when you feel hot is a prudent safety action to reduce risk, and hydration helps but doesn’t completely eliminate risk.