Which of the following correctly defines 'overhaul' in the context of firefighting?

In the context of firefighting, 'overhaul' specifically refers to the process of checking for and extinguishing hidden fire sources. This phase occurs after the main body of the fire has been extinguished but before the crews leave the scene. During overhaul, firefighters meticulously search through smoldering materials and structural spaces to identify any remaining hot spots or embers that could reignite. This step is crucial for ensuring that the fire is completely out and reducing the chances of a rekindle later on.

In this way, effective overhaul practices help ensure safety by preventing potential flare-ups in areas that are not immediately visible, allowing firefighters to fully secure the area. This step is integral to the firefighting process, enhancing the overall effectiveness of fire suppression efforts.