What does "overhaul" refer to in firefighting?

In firefighting, "overhaul" specifically refers to the thorough process of searching for hidden fire and ensuring that it has been completely extinguished. After the primary fire has been controlled and extinguished, firefighters conduct an overhaul to help prevent any remaining embers or hot spots from rekindling. This phase often involves moving debris, removing materials, and ensuring that all areas of the structure that may harbor hidden flames or heat are carefully checked and treated. This methodical examination is crucial in protecting property and preventing further damage.

The other options do not accurately capture the essence of what overhaul signifies in firefighting. For instance, the management of large crowds during emergencies is a distinct aspect of emergency response that doesn't relate to the specific technical work that overhaul involves. Gathering equipment after a fire is extinguished is more about post-incident clean-up rather than the focused technique meant to check for remaining fire hazards. Similarly, inspecting exits pertains more to overall building safety and evacuation procedures than to the specific process of ensuring all fire has been dealt with.