What action should rescuers take if heavy smoke or extreme heat fills a compartment during a search?

• A. Stay at the door
• B. Move below the smoke level
• C. Move above the smoke level
• D. Call for backup

Answer: (B)

When smoke and extreme heat fill a compartment, the fire and hot gases tend to rise and form a layer near the ceiling, while cooler, clearer air stays closer to the floor. Moving below the smoke level places rescuers in that cooler, less contaminated air, reducing heat exposure and preserving breathable air so the search can continue. Staying at the door can trap you in the doorway’s draft and the advancing conditions, and moving above the smoke level would put you into hotter, more toxic gases. Calling for backup is important, but the immediate action to protect yourself and improve survival chances is to get below the smoke level.