Sheltering in place is best described as:

• A. Evacuating all occupants from the structure
• B. Occupants staying inside a protected area
• C. Ventilating the building and reoccupying
• D. Immediate exterior shutdown and containment

Answer: (B)

Sheltering in place means keeping people inside a protected area and taking steps to minimize exposure to a hazard outside the building. The idea is to stay put rather than move through potentially contaminated air, so occupants aren’t exposed during evacuation or when outside air is unsafe.

This approach is used when the outside environment is dangerous or when moving people to another location would put them at greater risk, such as during chemical releases, smoke from a nearby fire, or a situation where the hazard isn’t yet controllable. Inside, occupants can stay away from doors and windows, close and seal rooms if directed, and wait for the all-clear or further instructions.

Evacuating all occupants isn’t appropriate here because it would expose people to the hazard as they leave or travel through contaminated areas. Ventilating the building and reoccupying would bring in outside air that may be contaminated, worsening exposure. Immediate exterior shutdown and containment describes actions focused on the environment outside the building or on stopping the source, rather than protecting people inside who should remain sheltered.