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FEMA 2024 Nuclear Detonation Guidance

FEMA's guidance on actions to take after a nuclear detonation, including getting inside, staying inside, and tuning in to authorities, with recommendations for sheltering and evacuation.

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Jan 15, 2026
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What are recommended sheltering times and distances from FEMA for nuclear attacks (2024 guidance)?

FEMA’s 2024 guidance emphasizes three simple actions after a nuclear detonation: get inside, stay inside, and tune in to authorities, because fallout begins to accumulate roughly 15 minutes after the ...