Shelter-in-Place: When Staying Is the Protocol
Most civilian guidance assumes evacuation. But for chemical incidents, certain industrial accidents, and many short-term threats, staying put — correctly — is what saves you.
The default is wrong
Movies show people running. Most real protocols recommend the opposite for many incident types. Shelter-in-place — sealing yourself inside a building until the threat passes — is the correct response to: chemical releases, smoke plumes, civil unrest in the immediate area, radiological events, and many "uncertain" first hours when leaving means moving toward unknown danger.
The 60-second sealing protocol
- Pick the right room. Smallest practical interior room. As few windows as possible. Above ground level (most chemical agents are heavier than air; basements concentrate hazards). Bathroom is often ideal — one window, a water supply, and walls of plumbing.
- Close everything that opens. Windows, doors, vents, fireplaces, dryer vents. Turn off HVAC, air-conditioning, and any extractor fans. They pull outside air in.
- Seal gaps. Damp towels at the base of doors. Plastic sheeting and tape over windows and vents — this is the 4-mil sheeting in the resilience kit. Keep tape ready; gaps the size of a pencil are enough to admit dangerous concentrations.
- Listen, do not panic. Local civil-protection authorities will broadcast through emergency channels — battery radio, official social accounts, EU-Alert text. The all-clear is also broadcast. Do not leave on your own assessment.
Duration
Most chemical incidents are over within 2–4 hours; smoke plumes from fires dissipate in 1–6 hours depending on wind. The 14-day shelter scenario is real but rare — for that, your normal kit (water, food, medication) covers you. The 2–4 hour scenario is far more common and requires only the discipline to stay inside.
What shelter-in-place is not
It is not the answer for fires, structural collapse, or floods rising into your building. It is not appropriate when staying means dying from the threat itself. The decision frame in the Resilience Score covers when to stay and when to leave; this article is the protocol for when staying is the answer.
One thing this week: identify your shelter room. Walk into it. Note what you would need to seal it in 60 seconds (towels? tape? where is the radio?). That five-minute exercise is most of the preparation.