Attack Mode

What Is Attack Mode?

Attack mode is the overall strategic posture the incident commander declares for a structure fire, and it determines what tactics crews are authorized to use. The three modes are offensive (crews enter the structure to perform interior fire attack and search, used when the building is structurally sound and there's a viable rescue or extinguishment opportunity), defensive (crews operate only from the exterior with master streams, used when the structure is too compromised or too far involved for safe interior operations), and transitional (a hybrid approach, often called 'transitional attack' or 'blitz attack,' where crews apply a quick exterior stream through a window or opening to knock down heat before or in place of making entry, buying time and cooling conditions). The declared mode is broadcast over the radio and must be updated any time conditions change enough to shift strategy.

Why Attack Mode Matters on the Fireground

Every firefighter operating on scene needs to know the current attack mode because it dictates whether interior operations are authorized at all — continuing an offensive interior attack after command has declared defensive (or vice versa without proper coordination) is a leading cause of firefighter injuries and deaths. Clear, consistent radio communication of attack mode, and immediate acknowledgment when it changes, is one of the most basic fireground safety practices.

Relevant NFPA Standards

• NFPA 1550: Standard for Emergency Responder Health and Safety
• NFPA 1750: Standard for the Organization and Deployment of Fire Suppression Operations, Emergency Medical Services, Special Operations, and Fire Prevention Activities

Field Procedures & Tactical Steps

1. Conduct a 360-degree size-up to assess fire conditions, structural integrity, and viable rescue opportunities before declaring attack mode.
2. Announce the declared attack mode clearly over the radio so all operating crews and mutual aid units are aware of the current strategy.
3. Match tactics to the declared mode — interior fire attack and primary search for offensive, exterior master streams only for defensive, or a quick knockdown stream for transitional before considering entry.
4. Continuously reassess conditions and be prepared to change attack mode if structural stability, fire behavior, or personnel safety changes.
5. Immediately transmit and confirm any change in attack mode, ensuring all interior crews withdraw and complete a PAR before switching to defensive operations.

Common Context & Application

Declared by the incident commander at the start of structural fire operations based on a 360-degree size-up, and reassessed continuously as conditions change — a building that starts in offensive mode can be switched to defensive if structural integrity degrades or fire conditions worsen beyond safe interior operating limits.

Frequently Asked Questions about Attack Mode