Fallout Shelters

Radioactive fallout is contamination in dust/particles that can settle after a nuclear incident. It is dangerous mainly because it irradiates from outside and because particles can enter the body via inhalation/ingestion.

Most effective action: get indoors

You gain the most by quickly getting into a building and limiting dust entry/spread. A basement or building core is usually best.

What to do immediately (first minutes)

Prioritize sheltering, dust control and reliable information.

Get indoors as fast as possible (building, basement).
Remove outer clothing and seal it; avoid tracking dust inside.
Wash skin and hair (no aggressive scrubbing).
Monitor official updates (radio/phone) and follow guidance.

What fallout is and why it matters

Fallout particles can settle on surfaces. More dense material between you and outdoors reduces gamma exposure.

Fallout Protection

Stay indoors, limit dust ingress, and choose the most shielded place you can.

A home fallout shelter

In practice this means a basement, underground garage, or an interior room on the lowest floor away from windows.

Choosing the best place

Farther from outer walls/roof is better. Keep an evacuation option for fire.

Basement or semi-basement, preferably central.
Interior windowless room on the lowest floor.
Add shielding mass (books/water containers) without overloading structures.

How long to stay?

It depends on the incident and official instructions. The early period is often the most hazardous and levels generally decline over time. Avoid unnecessary trips outside; if you must, minimize time and protect airways.

Fallout Supplies

Water in sealed containers, food in cans/jars, battery-operated radio (announcements), medicines (potassium iodide - only on explicit order of services).

If you must go outside

Treat it like a short mission: purposeful and minimal exposure.

Cover skin; after return, remove outer layer and wash exposed skin.
Avoid dust accumulation areas (gutters, corners, low spots).
Do a brief decon and keep dirty items out of living areas.