If there are more than how many evacuees, a full-time environmental health specialist (EHS) must monitor the shelter?

• A. 500 evacuees
• B. 1,000 evacuees
• C. 2,000 evacuees
• D. 5,000 evacuees

Answer: (B)

The main idea here is how staffing for environmental health in shelters scales with the number of evacuees. As the shelter population grows, the complexity of maintaining sanitary conditions, food safety, water and waste management, and disease prevention increases, so continuous, dedicated oversight becomes essential.

The correct threshold is when the shelter population exceeds one thousand evacuees. At that point, a full-time environmental health specialist must monitor the shelter to ensure ongoing compliance with health and safety standards and to promptly address any issues that arise in a larger, more complex operation.

Smaller shelters (below that threshold) don’t require a full-time EHS staffing level, though health oversight may still occur at varying levels. The other options show numbers either below the trigger or, while large numbers like two thousand or five thousand would also require oversight, they don’t define the boundary at which the rule switches to a full-time monitor—the switch happens at one thousand.