Ice Storm

Hazard in Severe Weather

A weight-driven infrastructure hazard: glaze ice brings down trees and power lines, leaving outages that can last for days.

Plans also call it: freezing rain, glaze, ice accretion

Talk to us about Ice StormAll 73 hazards →

What you’d hand your council

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

Evidence brief for Cedar Ridge County (example)

September 14, 2026

Ice Storm

Hazard in Severe Weather, on the established threats & hazards list

Impact
5432112345

Likelihood

Likelihood
2

Unlikely — Possible but infrequent — roughly once in 50 to 100 years (1–2% chance in any year).

Impact
2

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

Readiness
4

High — The organization has a well-developed capability to manage this threat or hazard. Plans, personnel, resources, and skills are largely in place, and the capability has been meaningfully tested or demonstrated. Remaining gaps are unlikely to significantly impair performance.

  • 2source documents
  • 58verified mentions
  • 2federal declarations
  • 91.6NRI score, relatively high
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 National Risk Index: Ice Storm

$1.0B
expected loss a year, nationally
536
counties rated high or very high

Your county’s own rating is the first thing we pull.

How it maps

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

FEMA National Risk Index
Ice Storm (ISTM)one of the 18 hazards NRI scores per county
FEMA declaration incident type
Severe Ice Storm75 declarations on record
NOAA Storm Events type
Ice Storm
Hazzard category
Severe Weather, natural hazards

How it connects

The national record

What the federal data says about Ice Storm

The same national sources a Hazzard brief starts from. For your jurisdiction we narrow each one to your county and its neighbors.

Where Ice Storm is rated high

Share of each state's counties FEMA rates Relatively High or Very High

Alabama: 2 of 67 counties rated high (3%) · $6M expected loss a yearAlaska: 0 of 30 counties rated high (0%) · $220K expected loss a yearArizona: 0 of 4 counties rated high (0%) · $371K expected loss a yearArkansas: 62 of 75 counties rated high (83%) · $129M expected loss a yearCalifornia: not rated for Ice StormColorado: 0 of 64 counties rated high (0%) · $3M expected loss a yearConnecticut: 5 of 9 counties rated high (56%) · $10M expected loss a yearDelaware: 1 of 3 counties rated high (33%) · $2M expected loss a yearDistrict of Columbia: 0 of 1 counties rated high (0%) · $222K expected loss a yearFlorida: 0 of 8 counties rated high (0%) · $246K expected loss a yearGeorgia: 10 of 159 counties rated high (6%) · $23M expected loss a yearHawaii: 0 of 3 counties rated high (0%) · $164K expected loss a yearIdaho: 1 of 44 counties rated high (2%) · $2M expected loss a yearIllinois: 4 of 102 counties rated high (4%) · $15M expected loss a yearIndiana: 2 of 92 counties rated high (2%) · $11M expected loss a yearIowa: 4 of 99 counties rated high (4%) · $12M expected loss a yearKansas: 31 of 105 counties rated high (30%) · $55M expected loss a yearKentucky: 26 of 120 counties rated high (22%) · $30M expected loss a yearLouisiana: 18 of 64 counties rated high (28%) · $33M expected loss a yearMaine: 15 of 16 counties rated high (94%) · $26M expected loss a yearMaryland: 0 of 24 counties rated high (0%) · $3M expected loss a yearMassachusetts: 7 of 14 counties rated high (50%) · $20M expected loss a yearMichigan: 10 of 83 counties rated high (12%) · $24M expected loss a yearMinnesota: 0 of 87 counties rated high (0%) · $8M expected loss a yearMississippi: 3 of 82 counties rated high (4%) · $9M expected loss a yearMissouri: 39 of 115 counties rated high (34%) · $57M expected loss a yearMontana: 1 of 56 counties rated high (2%) · $3M expected loss a yearNebraska: 8 of 93 counties rated high (9%) · $19M expected loss a yearNevada: 0 of 4 counties rated high (0%) · $567K expected loss a yearNew Hampshire: 6 of 10 counties rated high (60%) · $9M expected loss a yearNew Jersey: 11 of 21 counties rated high (52%) · $21M expected loss a yearNew Mexico: 2 of 33 counties rated high (6%) · $2M expected loss a yearNew York: 17 of 62 counties rated high (27%) · $28M expected loss a yearNorth Carolina: 35 of 100 counties rated high (35%) · $52M expected loss a yearNorth Dakota: 9 of 53 counties rated high (17%) · $21M expected loss a yearOhio: 22 of 88 counties rated high (25%) · $36M expected loss a yearOklahoma: 63 of 77 counties rated high (82%) · $102M expected loss a yearOregon: 8 of 36 counties rated high (22%) · $10M expected loss a yearPennsylvania: 6 of 67 counties rated high (9%) · $15M expected loss a yearRhode Island: 1 of 5 counties rated high (20%) · $1M expected loss a yearSouth Carolina: 29 of 46 counties rated high (63%) · $42M expected loss a yearSouth Dakota: 6 of 66 counties rated high (9%) · $20M expected loss a yearTennessee: 13 of 95 counties rated high (14%) · $19M expected loss a yearTexas: 43 of 254 counties rated high (17%) · $83M expected loss a yearUtah: 0 of 29 counties rated high (0%) · $581K expected loss a yearVermont: 0 of 14 counties rated high (0%) · $2M expected loss a yearVirginia: 2 of 133 counties rated high (2%) · $8M expected loss a yearWashington: 11 of 39 counties rated high (28%) · $18M expected loss a yearWest Virginia: 1 of 55 counties rated high (2%) · $3M expected loss a yearWisconsin: 1 of 72 counties rated high (1%) · $6M expected loss a yearWyoming: 1 of 23 counties rated high (4%) · $2M expected loss a year
  • None
  • Up to 10%
  • 10–25%
  • 25–50%
  • Over 50%
  • Not rated
FEMA National Risk Index v1.20.0, county table

75 federal declarations since 1968

Declarations FEMA filed as “Severe Ice Storm”, by year (2026 to date)

010201968: 1 declaration1976: 2 declarations1977: 1 declaration1990: 1 declaration1991: 3 declarations1997: 1 declaration1999: 3 declarations2000: 3 declarations2001: 3 declarations2002: 4 declarations2003: 5 declarations2004: 1 declaration2006: 1 declaration2007: 7 declarations2008: 3 declarations2009: 8 declarations2010: 1 declaration2013: 1 declaration2014: 9 declarations2015: 3 declarations2017: 1 declaration2020: 1 declaration2021: 11 declarations2025: 1 declaration2021: 11197019801990200020102020
OpenFEMA Disaster Declarations Summaries, as of 2026-09-27. Counts distinct disasters; major, emergency and fire-management declarations.

In your plan

What a Ice Storm 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 Ice Storm.

  1. Location

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

    National data

    FEMA's National Risk Index rates Ice Storm for every county. We place yours against its neighbors and the state, then add what your plans map in more detail.

  2. Extent

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

    Your documents

    The magnitude your plans use for Ice Storm (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)

    National data

    Every FEMA declaration filed as Severe Ice Storm that included your county, back to 1953, alongside the events your own records and after-action reports describe.

  4. Probability of future events

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

    National data

    NRI's annualized frequency for your county, and the declaration history, drafted into a likelihood on your own scale for your team to accept or change.

  5. Vulnerability and impacts

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

    National data

    NRI's expected annual loss and social vulnerability for your county, the Census population profile and HHS emPOWER counts, with the impacts your plans already describe.

  6. The assessment itself

    Your team decides

    Likelihood, impact and readiness for Ice Storm 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 Ice Storm

  1. 1

    We pull your county's record

    FEMA's National Risk Index rating and expected loss, every disaster declaration, and the daily temperature record behind heat and cold, before we meet.

  2. 2

    We read the plans you already have

    Your hazard mitigation plan and EOP annexes, so you can see what they say about Ice Storm and where the profile stops short.

  3. 3

    You leave with a cited brief

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

Also in Severe Weather

Preparing for Ice Storm

Walk into your next plan update with Ice Storm already sourced.

Severe weather is the part of a plan everyone assumes is covered. We check whether yours says why, with your county's own record instead of a regional average. A person replies within one business day.

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