Which action helps prevent a secondary collapse at a rescue site?

• A. Securing debris and establishing exclusion zones
• B. Entering newly moved debris to assess stability
• C. Removing barriers to speed access
• D. Ignoring monitoring data

Answer: (A)

Preventing a secondary collapse at a rescue site comes down to controlling hazards and limiting exposure as operations proceed. Securing debris and establishing exclusion zones physically stabilizes potentially unstable material and keeps nonessential personnel out of the danger area, reducing the chance that shifting debris will collapse further and trap rescuers or victims. Entering newly moved debris to assess stability is dangerous because it can trigger additional movement. Removing barriers to speed access undermines site control and increases risk, while ignoring monitoring data eliminates critical information that helps adapt to changing conditions. Keeping debris secured and zones in place is the most effective way to maintain a safer, more stable rescue environment.