When should you shelter in place rather than evacuate?

When should you shelter in place rather than evacuate?

• A. When the release is contained, and evacuation would expose more people to risk.
• B. When evacuation routes are clear and there is time to evacuate everyone safely.
• C. When the release is contained, public locations would be riskier to evacuate, or as directed by authorities, supported by monitoring data.
• D. When responders decide to shelter, regardless of monitoring data.

Answer: (C)

Shelter in place is chosen when moving people would expose more to the hazard and staying inside reduces exposure, especially when officials have data and direction to do so. The best option says the release is contained, evacuation would be riskier in public locations, or the decision follows authorities and is supported by monitoring data. That combination—contained release, higher risk from moving people, and data-driven or directive guidance—tells you sheltering is safer and appropriate. In contrast, evacuating is favored when routes are clear and there’s time to move people safely, which is a different scenario. And sheltering without any monitoring data or official direction isn’t reliable for making a protective decision.

Shelter in place is chosen when moving people would expose more to the hazard and staying inside reduces exposure, especially when officials have data and direction to do so. The best option says the release is contained, evacuation would be riskier in public locations, or the decision follows authorities and is supported by monitoring data. That combination—contained release, higher risk from moving people, and data-driven or directive guidance—tells you sheltering is safer and appropriate.

In contrast, evacuating is favored when routes are clear and there’s time to move people safely, which is a different scenario. And sheltering without any monitoring data or official direction isn’t reliable for making a protective decision.