What does 'overhaul' in firefighting refer to?

In firefighting, 'overhaul' specifically refers to the process of inspecting and securing an area post-fire to ensure that all hidden fires, hot spots, or smoldering materials are thoroughly extinguished. This critical step helps to prevent reignition and ensures the safety of both firefighters and the surrounding community. During overhaul, firefighters examine various materials and areas that may not have been fully extinguished, often using thermal imaging cameras or physical inspection to detect lingering heat sources.

This practice not only prioritizes safety by mitigating risks associated with potential flare-ups but also helps in gathering information about the fire's behavior and spread for future reference and training. The other options, while related to fire response and management, do not capture the specific essence of what 'overhaul' entails in the firefighting context.