What strategy should be implemented if a firefighter encounters rapid fire spread upon entering a structure?

When a firefighter encounters rapid fire spread upon entering a structure, initiating defensive operations is an appropriate response. This strategy involves transitioning from an offensive approach, which focuses on directly attacking the fire, to a defensive posture that prioritizes the safety of personnel and minimizes the risk of further injury or casualties.

Defensive operations are essential in situations where the fire's behavior is unpredictable and poses an immediate threat to the firefighter's safety. By implementing defensive tactics, firefighters can protect themselves and others, secure nearby exposures, and manage the situation in a controlled manner. This approach often includes utilizing master streams, creating a safe zone, and potentially waiting for additional resources before proceeding further into the structure.

Selecting this strategy demonstrates a critical understanding of fire dynamics, risk assessment, and prioritization of safety over aggressive firefighting, ensuring that personnel do not become trapped or injured in a rapidly deteriorating environment.