What does "wet down" refer to in firefighting operations?

The phrase "wet down" in firefighting operations specifically refers to the action of applying water to reduce smoke and dust during the overhaul phase of a firefighting operation. During overhaul, firefighters work to extinguish any remaining hot spots and to ensure that the fire is completely out, which often results in residual smoke and debris. By wetting down the area, the visibility is improved, helping crews to safely assess the scene and reduce the potential for secondary fires caused by embers or undetected, smoldering materials.

This technique is vital to maintaining safety in the environment post-fire and ensures that firefighters can operate effectively without the interference of smoke and dust.