Nuclear Incident

Hazard in Hazardous Materials

A low-probability, high-consequence hazard centered on nuclear facilities, with planning zones that extend miles beyond the fence line.

Plans also call it: nuclear power plant accident, radiological emergency, nuclear detonation, nuclear attack, radiological dispersal device, dirty bomb, nuclear emergency

Talk to us about Nuclear IncidentAll 73 hazards →

What you’d hand your council

The first page of a Nuclear Incident evidence brief: likelihood, impact and readiness on your own scale, every figure sourced.

Evidence brief for Cedar Ridge County (example)

September 14, 2026

Nuclear Incident

Hazard in Hazardous Materials, on the established threats & hazards list

Impact
5432112345

Likelihood

Likelihood
4

Likely — Expected within the decade — roughly once in 1 to 10 years (10–100% chance in any year).

Impact
4

Major — Severe effects — casualties possible, serious damage across a significant share of the jurisdiction, essential services disrupted for weeks, outside assistance needed.

Readiness
2

Low — Some elements of capability are in place, but important gaps remain that could significantly limit the organization's ability to perform effectively. Additional development is needed before the capability can be relied upon.

  • 2source documents
  • 58verified mentions
  • —federal declarations
  • —NRI risk score
Worked example: Cedar Ridge County is fictional. The scores illustrate the format and are nobody's decision. Open a full sample brief →

The national record

FEMA’s National Risk Index doesn’t model Nuclear Incident. Your team fills it with local evidence, and Hazzard shows the gap rather than a zero.

How it maps

The same hazard in the vocabularies your plan and FEMA already use.

FEMA National Risk Index
Not covered
FEMA declaration incident type
Not covered
NOAA Storm Events type
Not covered
Hazzard category
Hazardous Materials, infrastructure and technology

The national record

What the federal data says about Nuclear Incident: nothing yet

No federal dataset scores Nuclear Incident or files declarations under it. That's common for threats and emerging hazards, and it's why a brief for Nuclear Incident is built from your own plans, exercises and records. Hazzard shows the gap instead of inventing a number.

In your plan

What a Nuclear Incident profile needs, and where each part comes from

A local hazard mitigation plan profiles each hazard the same way (44 CFR 201.6). Here is how Hazzard fills each part for Nuclear Incident.

  1. Location

    44 CFR 201.6(c)(2)(i)

    Your documents

    No national layer maps Nuclear Incident. We draw the geographic extent from your plans, studies and annexes, cited to the page.

  2. Extent

    44 CFR 201.6(c)(2)(i)

    Your documents

    The magnitude your plans use for Nuclear Incident (a scale, a depth, an acreage, a duration), read from your documents and cited, so the profile states the strength you plan for.

  3. Previous occurrences

    44 CFR 201.6(c)(2)(i)

    Your documents

    FEMA files no declaration type for Nuclear Incident. The history comes from your after-action reports, incident records and plans.

  4. Probability of future events

    44 CFR 201.6(c)(2)(i)

    Your team decides

    No national dataset gives a frequency for Nuclear Incident. Your team scores likelihood on your scale from the evidence we organize.

  5. Vulnerability and impacts

    44 CFR 201.6(c)(2)(ii)

    Your documents

    The Census population profile and HHS emPOWER counts for context; the consequences themselves come from your plans and exercises.

  6. The assessment itself

    Your team decides

    Likelihood, impact and readiness for Nuclear Incident are drafted with every source attached, and a person on your team accepts each one. Hazzard never records a score on its own.

How we can help

How we’d help you prepare for Nuclear Incident

  1. 1

    We pull your record

    Chemical and toxic-substance declarations, and the population profile that shapes who a release would reach.

  2. 2

    We read your plans and annexes

    Your EOP's hazmat annex and mitigation plan, so what they say about Nuclear Incident is cited and what they skip is visible.

  3. 3

    You leave with a cited brief

    Likelihood, impact and readiness for Nuclear Incident on your own scale, every figure tied to its source, ready for the planning team or the council.

Also in Hazardous Materials

Preparing for Nuclear Incident

Know what moves through, and what's stored nearby, before Nuclear Incident happens.

Hazardous materials response starts the same way however it begins: knowing what is there. We connect your plans, your federal record and who would be exposed. A person replies within one business day.

Already have an account? Sign in

Request a walkthrough

Takes about two minutes. A person reads every request.

Define your footprint on the map first