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Threats / EMP

EMP

An engineering-grade look at electromagnetic pulse — what the physics actually says, and what’s rational.

ScopeNationalCauseVariousDriven bySystemicImpactCatastrophicLikelihoodRare

Why it matters

What EMP would mean for you

Three numbers decide how important EMP is to your preparedness planning. Impact and Likelihood are general baselines. Vulnerability depends on how prepared you are for this threat.

ImpactCatastrophic9/9

NegligibleCatastrophic

A true wide-area EMP would drop the grid for a long time, cascading into the same mass-casualty failures as a long grid-down - a catastrophic Impact examined against real physics.

LikelihoodRare1/9

RareFrequent

Extremely unlikely in any given year, which puts the Likelihood at the bottom of the scale.

VulnerabilityNot rated

NegligibleCatastrophic

This number is yours. It measures how hard EMP would actually hit your household given what you already have in place. Rate it in Threat Planning — then all three multiply into your personal threat rating.

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General baselines — How we rate threats →

Be ready

Preparing for EMP

Concrete moves that lower your Vulnerability. Add any of them and we'll track it as an action on your threat list.

Add to my threat list

Build long-duration grid-down reserves of water, food, and heat.

Keep some critical electronics in basic shielding if you choose.

Keep non-electronic tools and skills.

Plan for prolonged self-reliance, sized soberly to the odds.

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Articles on EMP

Deep Dive

Current Events·5 min read

Details have come out surrounding the FORTRESS initiative as well as details surrounding the Next Great American Base selection.

FORTRESS is directing that all US bases be self-sufficient for 90 days — this should alarm all Americans. The details about Next Great American Base isn't nearly as surprising, except for the timeline.

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Deep Dive

Current Events·7 min read

The military is cutting its bases loose from the civilian grid. That tells you what war it's expecting.

FORTRESS America and the Next Great American Base are about energy independence, reshored supply chains and hardened installations — the same homeland-resilience problem you work at your house, solved at the scale of a continent.

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How-To

Threat Analysis·4 min read

EMP or CME Specific Preparations for the Super-Prepper

If you are worried about an EMP or CME and want the absolute best preparation for this threat, you've found the right place.

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Keep close

Resources for EMP

Threat Analysis

EMP Reference Library

A working archive of 94 government and laboratory primary sources on the electromagnetic pulse — from the 1940s Los Alamos shock-physics work through the modern EMP Commission and DHS reports.

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See it on the map

EMP where you live.

The transformers and lines an EMP would take with it.

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Lower

Higher

A national view — this is one of 410+ layers in Area Recon. Open it to zoom to your address, then add the hazards, infrastructure, terrain and resources around you, and read the real numbers for your county.

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Act on it