What is the recommended action if the fire location is unknown or significantly large?

In situations where the fire location is unknown or the area is extensive, the recommended action is to move to the floor below. This approach is based on several safety and tactical considerations.

By operating from a lower floor, firefighters can minimize their exposure to potential hazards that may arise from an unknown fire source, such as smoke, heat, or structural instability. Fire tends to rise, and cooler air is often found lower down, which also helps improve visibility and access to fresh air. Additionally, being on the floor below allows firefighters to assess conditions safely and plan an effective response to locate and control the fire. It provides a strategic advantage in gaining information and coordinating efforts without being directly exposed to the dangerous environment above.

This option is often more safe than attempting to access the roof or directly approach the fire from the entrance level, where visibility and conditions can be hazardous due to heat and smoke.