This tactical phase involves hitting the main body of fire with enough water or extinguishing agent to stop its forward progress and darken the heavy flames. It transitions an incident from an uncontrolled, growing fire to a manageable state. It does not mean the fire is completely extinguished, as hidden hotspots usually remain.
Heard on the job
We managed to knock down the main fire in the living room, but we still have heavy smoke pushing from the attic.
Also heard as
- darken down