Fireground Sector

What Is Fireground Sector?

A fireground sector (called a division or group under NIMS terminology) is a geographic or functional area of an incident assigned to a specific officer, who reports to command and manages resources and tasks within that area.

Why Fireground Sector Matters on the Fireground

Sectoring is what lets a single incident commander manage a large, multi-sided incident — without it, command would need to track every individual crew directly, which becomes impossible to do safely once an incident grows beyond a handful of resources.

Relevant NFPA Standards

• NFPA 1550: Standard for Emergency Responder Health and Safety

Field Procedures & Tactical Steps

1. Establish sectors as soon as incident size exceeds a single officer's manageable span of control.
2. Assign a sector officer responsible for personnel accountability and task completion within that area.
3. Require sector officers to report status and any hazards to command at regular intervals.
4. Adjust sector boundaries or add sectors as the incident grows or conditions change.

Common Context & Application

Established as an incident grows in size or complexity, typically assigned by geographic side of a structure (Division A, B, C, D) or by function (ventilation group, search group).

Frequently Asked Questions about Fireground Sector