In hot PPE, hourly loss is approximately which value?

• A. 2 quarts per hour
• B. 1 quart per hour
• C. 3 quarts per hour
• D. 4 quarts per hour

Answer: (A)

When you’re working in hot conditions while wearing protective gear, sweating becomes the main way the body tries to cool itself, but the gear slows heat loss, so sweat rates run high. The typical hourly fluid loss under hot PPE is about two quarts per hour (roughly 1.9 liters). This helps you plan hydration and rest to prevent dehydration and heat stress during live-fire training. A smaller value like one quart underestimates the sweat rate under these conditions, while much larger values would exceed what can be reasonably replaced during safety breaks, so two quarts per hour is the best estimate.