What does the term 'overhaul' refer to in firefighting?

The term 'overhaul' in firefighting specifically refers to the process of checking for hidden fires after the main fire has been extinguished. This stage is critical as it involves searching for any remaining hotspots or embers that could reignite the fire, which poses a significant risk. Firefighters meticulously inspect the affected area, often removing materials such as burned debris and insulation to ensure that the fire has been completely eradicated and that the scene is safe.

In this context, after the flames are initially put out, the focus shifts to a thorough examination to prevent any possibility of a rekindle. This step is essential in fire suppression efforts, ensuring residual heat does not reignite any flames, thus safeguarding both the fire personnel and the structure involved.

Other options relate to different aspects of firefighting but do not accurately define the term 'overhaul.' The initial extinguishment of flames corresponds to the active firefighting phase, rescue operations refer to saving individuals trapped during a fire, and securing the area pertains to ensuring the safety of the scene post-incident. Each has its significance, but none encapsulate the critical task of thoroughly searching for and mitigating hidden fires, which is what overhaul specifically addresses.