shelterinplace

Shelterinplace, also written as shelter-in-place or shelter in place, refers to an emergency procedure in which occupants of a building stay indoors and take steps to protect themselves from external hazards rather than evacuating. It is used in response to incidents such as hazardous chemical releases, toxic smoke or fumes, severe weather, or other threats that may be mitigated by staying inside.

The decision to shelter in place is typically guided by authorities and public advisories. If instructed, individuals should quickly locate a safe indoor space, preferably an interior room with few or no exterior windows. Close and lock exterior doors and windows, turn off and seal off heating, ventilation, and air conditioning systems if safe to do so, and seal gaps under doors with towels or duct tape if available. Gather essential supplies, including water, medications, and a battery-powered radio or device for updates. Avoid unnecessary movement and minimize opening doors and windows.

During a shelter-in-place period, occupants should monitor official information sources for instructions on how long to remain sheltered and when it is safe to leave. The approach is not a substitute for evacuation when authorities determine that leaving the area is necessary; it is intended to reduce exposure to outside hazards until it is safe to resume normal activities.

Afterward, people should follow official guidance to ventilate spaces and recover, discarding or quarantining contaminated materials as advised. Shelterinplace is a general precaution used in many countries and may have variations in procedure depending on specific hazards and local guidance.