What are the three operating zones used at emergency scenes?

• A. Action, staging, and standby
• B. Hot, warm, and cold zones
• C. Operations, staging, and command
• D. Divisions, sectors, and command

Answer: (B)

At emergency scenes, safety is managed by dividing the area into zones that reflect different hazard levels. The three operating zones are hot, warm, and cold zones. The hot zone is where the hazard is present and operations occur; access is limited to trained personnel wearing the proper PPE. The warm zone surrounds the hot zone and serves as a buffer for decontamination and PPE donning/doffing, as well as staging equipment and personnel. The cold zone is the safe area where command posts, support functions, medical treatment, rehab, and communications are located; there’s no direct exposure to the hazard. This zone arrangement helps protect responders and the public by containing hazards and directing workflow from high-risk to safer areas. Other terms describe roles or organizational units rather than the actual zones used at scenes, so they don’t represent the three operating zones.