A wildland fire is considered contained when there is what?

A wildland fire is considered contained when there is what?

• A. 100% extinguishment within 100' of fire line
• B. Fire is fully suppressed within 200' of the line
• C. All units have left the scene
• D. No smoke for 1 hour

Answer: (A)

Containment means securing a control line around the fire and ensuring there is no heat or active flame near that line so the fire can’t spread beyond it. The best answer reflects this by stating that every part of the fire within 100 feet of the fire line has been extinguished, which means the line is cooled and the fire cannot breach it. This precise measure—100% extinguishment within a defined distance—provides a clear, objective way to confirm the line will hold. The other ideas don’t describe containment in the same way. Simply being fully suppressed farther from the line (like within a larger distance), or having units leave the scene, or not seeing smoke for an hour, don’t guarantee that the fire is unable to escape the established line in the near term. Containment focuses on securing the line and eliminating heat and flame up to a set distance from it to prevent growth.

Containment means securing a control line around the fire and ensuring there is no heat or active flame near that line so the fire can’t spread beyond it. The best answer reflects this by stating that every part of the fire within 100 feet of the fire line has been extinguished, which means the line is cooled and the fire cannot breach it. This precise measure—100% extinguishment within a defined distance—provides a clear, objective way to confirm the line will hold.

The other ideas don’t describe containment in the same way. Simply being fully suppressed farther from the line (like within a larger distance), or having units leave the scene, or not seeing smoke for an hour, don’t guarantee that the fire is unable to escape the established line in the near term. Containment focuses on securing the line and eliminating heat and flame up to a set distance from it to prevent growth.