Which control zone has the largest perimeter?

Which control zone has the largest perimeter?

• A. Cold zone
• B. Hot zone
• C. Warm zone
• D. Staging area

Answer: (A)

In incident and hazard-zone planning, zones are arranged from highest risk outward. The hot zone surrounds the hazard itself, so its boundary is the smallest. The warm zone sits between hot and cold as a buffer, giving it a larger boundary than the hot zone. The cold zone lies farthest from the hazard and includes command, staging, and other support areas; its outer boundary wraps around the entire operation, making it the largest perimeter. The staging area is a function inside the cold zone, not a separate outer boundary, so the cold zone overall has the largest perimeter.

In incident and hazard-zone planning, zones are arranged from highest risk outward. The hot zone surrounds the hazard itself, so its boundary is the smallest. The warm zone sits between hot and cold as a buffer, giving it a larger boundary than the hot zone. The cold zone lies farthest from the hazard and includes command, staging, and other support areas; its outer boundary wraps around the entire operation, making it the largest perimeter. The staging area is a function inside the cold zone, not a separate outer boundary, so the cold zone overall has the largest perimeter.