Attack-Based Mass Casualty & Fatality Incident

Threat in Violence and Physical Attack, arrives with intent

A deliberate, rapidly unfolding threat that overwhelms responders and hospitals in minutes and leaves lasting community trauma.

Plans also call it: active shooter, active assailant, mass shooting, vehicle ramming, complex coordinated attack, armed attack, active threat, mass casualty attack

Talk to us about Attack-Based Mass Casualty & Fatality IncidentAll 73 hazards →

What you’d hand your council

The first page of a Attack-Based Mass Casualty & Fatality Incident evidence brief: likelihood, impact and readiness on your own scale, every figure sourced.

Evidence brief for Cedar Ridge County (example)

September 14, 2026

Attack-Based Mass Casualty & Fatality Incident

Threat in Violence and Physical Attack, 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
2

Minor — Limited effects — few injuries, damage confined to a small area, brief localized disruption of services.

Readiness
3

Moderate — The organization has a generally established capability to manage this threat or hazard, but identifiable gaps remain. The organization could likely perform many required actions, though effectiveness may vary depending on conditions, staffing, resources, or complexity.

  • 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 Attack-Based Mass Casualty & Fatality 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
Violence and Physical Attack, human-caused and societal

The national record

What the federal data says about Attack-Based Mass Casualty & Fatality Incident: nothing yet

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

In your plan

What a Attack-Based Mass Casualty & Fatality 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 Attack-Based Mass Casualty & Fatality Incident.

  1. Location

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

    Your documents

    No national layer maps Attack-Based Mass Casualty & Fatality 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 Attack-Based Mass Casualty & Fatality 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 Attack-Based Mass Casualty & Fatality 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 Attack-Based Mass Casualty & Fatality 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 Attack-Based Mass Casualty & Fatality 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 Attack-Based Mass Casualty & Fatality Incident

  1. 1

    We start from what you own

    Your EOP, threat assessments, exercise and after-action reports, read and filed so every statement about Attack-Based Mass Casualty & Fatality Incident points to its page.

  2. 2

    We show the gap honestly

    Where the national record is silent, the brief says so, and your team's local evidence carries the score instead of a zero.

  3. 3

    You leave with a cited brief

    Likelihood, impact and readiness for Attack-Based Mass Casualty & Fatality Incident on your own scale, every figure tied to its source, ready for the planning team or the council.

Also in Violence and Physical Attack

Preparing for Attack-Based Mass Casualty & Fatality Incident

Assess Attack-Based Mass Casualty & Fatality Incident with the evidence you hold, carefully organized.

No federal dataset scores targeted violence for your county, and a brief that pretended otherwise would not survive the first question. We build the assessment from your own plans, exercises and after-action reports. A person replies within one business day.

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