FEMA Records
13
Low volume
Wisconsin · FEMA + NOAA + National Risk Index
Walworth County, WI
13 FEMA disaster declarations (1965-2020), with a FEMA National Risk Index rating of Relatively Low. Most common hazard: Severe Storm.
- 13
- FEMA declarations
- 8
- Major disasters
- 75
- NRI risk · Relatively Low
- Severe Storm
- Top hazard
The verdict
Two federal records point in the busier direction for Walworth County. Its 13 FEMA declarations are 6% above the Wisconsin county mean and exceed the count for 17% of the 3,266 counties in this registry. Separately, FEMA's National Risk Index places it in the riskiest 25%, based on modeled expected annual loss, social vulnerability, and community resilience.
- Riskiest 25%
- of U.S. counties for FEMA National Risk Index score
- Relatively Low
- FEMA National Risk Index rating
- 13
- FEMA declarations vs 21 national county avg
- 46
- NFIP flood insurance claims filed
FEMA's National Risk Index and its declaration registry are separate measures. This county's registry includes Major Disaster (DR) and Emergency (EM) records; an EM authorizes a narrower set of federal assistance than a DR.
How does Walworth County compare?
Walworth County vs. all counties in this dataset
FEMA disaster declarations, all-time
13 17th percentile higher than 17% of 3,266 counties
Each bar is a band; taller bars hold more counties. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source FEMA Disaster Declarations Summaries v2 · 2026-08-03
Walworth County's FEMA Risk Index score
FEMA National Risk Index composite score vs. the Wisconsin county average
Which hazard drives modeled loss here?
FEMA's modeled annual dollar loss for Walworth County is led by Riverine Flooding (about $17.6M Expected Annual Loss, Historical Loss Ratio Relatively High), while Hail carries the highest National Risk Index rating (Relatively High). EAL and risk score use different inputs; they need not agree.
Source: FEMA National Risk Index (December 2025 release) - Expected Annual Loss vs composite risk rating by hazard.
What does Walworth County's hazard record show?
FEMA National Risk Index
This county carries a high composite score on FEMA's National Risk Index, 74.8/100, rated Relatively Low. Its Expected Annual Loss rating is Relatively Low (roughly $39.7M in annualized losses), and a Relatively Low social-vulnerability profile combined with Very High community resilience shapes how much of that raw exposure becomes realized harm. Of the 18 hazards FEMA models, Hail stands out as the sharpest exposure here, rated Relatively High. FEMA's modeled frequency puts that hazard at an average of 4.4 times per year here, based on 168 historical events on record.
Declaration frequency
The FEMA register is busy by both local and national comparisons. It contains 13 entries for Walworth County, including 8 Major Disaster records, 6% above the Wisconsin county mean. Across the 55-year span, that works out to 0.2 declarations a year. Severe Storm leads the file with 3 entries. Declaration type records the federal action taken, not every assistance program approved.
Reading the federal records together
This county has a small entry in FEMA's NFIP paid-claims table: 46 claims and $635.1K paid in total. PlainHazard calls 1-49 claims a light registry record, a label for this dataset rather than a finding that flood exposure is low. A short claims history can also reflect insurance take-up, the period covered, or losses that were never insured.
The declaration register points in the busier direction. Walworth County's 13 federal records stand 6% above the Wisconsin county mean of 12.3. That comparison describes how often federal action was recorded, including any Major Disaster, Emergency, and Fire Management entries shown on this page; it does not convert the count into future probability.
55 /100
Historical Activity Index
High historical activity
Walworth County, WI · PlainHazard-derived composite from federal records
This 0–100 index is an explicit PlainHazard composite from FEMA declaration history only on the county surface (this DB has no county-level NOAA damage row) . It is not FEMA's National Risk Index, not a forecast, and not a safety, insurance, or preparedness rating. Open the calculator · Methodology
FEMA Declarations (1953–present) Moderate
9/30
13 OpenFEMA declarations, full ingest window (0.6x national county average)
County Disaster Density High
13/25
13 declarations (1.1x state county average of 12)
Major Disaster Share High
15/25
8 of 13 declarations are major disasters (62%)
Hazard Diversity Very High
18/20
7 different disaster types declared in Walworth County
Historical Declaration Activity
Activity Band
High
vs. Wisconsin Avg
+6%
State avg: 12.3
vs. National Avg
-37%
National avg: 20.7
Avg Per Year
0.2
Over 55 years
FEMA NRI 8-hazard radar - Walworth County
How to read this radar
Each axis: NRI risk rating (Very Low-Very High) on a 0-100 scale. Rounder = broad exposure; spiky = one or two hazards dominate.
Major Disaster share
62%
Major-heavy
NRI risk score
75
Relatively Low
Source: FEMA National Risk Index Per-county per-hazard ratings, December 2025 release
How often does each hazard strike Walworth County?
FEMA's National Risk Index models a historical event count and an annualized frequency for each hazard type. Most hazards are expressed as modeled occurrences per year; FEMA expresses drought and heat-wave frequency as event-days per year. These modeled frequencies are not forecasts.
| Hazard | NRI Risk Rating | Recurrence |
|---|---|---|
| Hail | Relatively High | an average of 4.4 times per year |
| Tornado | Relatively Moderate | roughly once every 2 years |
| Cold Wave | Relatively Moderate | an average of 5.5 times per year |
| Strong Wind | Relatively Moderate | an average of 5.3 times per year |
| Lightning | Relatively Moderate | an average of 38 times per year |
| Heat Wave | Relatively Low | 3.6 modeled event-days per year |
| Riverine Flooding | Relatively Moderate | roughly once every 1 years |
| Landslide | Relatively Low | roughly once every 8 years |
| Winter Weather | Relatively Low | an average of 14 times per year |
| Earthquake | Very Low | roughly once every 1,122 years |
| Ice Storm | Relatively Low | roughly once every 1 years |
| Drought | Relatively Low | 6.4 modeled event-days per year |
| Wildfire | Very Low | roughly once every 15,096 years |
| Hurricane | Very Low | roughly once every 174 years |
Source: FEMA National Risk Index Modeled annualized frequency; drought and heat wave use event-days/year, December 2025 release
Disaster Types
Snowstorm 3
Severe Storm 3
Biological 2
Flood 2
Hurricane 1
Drought 1
Tornado 1
What Severe Storm declarations mean here
Severe Storm is the most frequent declaration type on Walworth County's record, 23% of its declarations. In FEMA's vocabulary this covers convective weather: thunderstorm straight-line winds, large hail, and the multi-day outbreaks that often carry embedded tornadoes. Activity is heaviest in spring and summer, though the season varies by region.
These events behave differently from a hurricane on paper. Damage tends to be distributed along a storm track rather than concentrated on a coastline, and a declaration typically follows an outbreak that crossed several counties over a few days, not a single point of impact. Because the qualifying threshold is the cost of uninsured public and individual losses rather than storm intensity, two similar storms can produce a declaration in one year and none in another.
Declaration counts describe past federal action. They are a record of what was declared, not a forecast of future hazard probability.
Declaration Types
What DR / EM / FM mean
FEMA categorizes declarations as Major Disasters (DR), Emergencies (EM), or Fire Management Assistance (FM).
Major Disaster - 8 61.5%
of all 13 declarations
Emergency - 5 38.5%
of all 13 declarations
FEMA Declarations Timeline
| Year | Declarations | |
|---|---|---|
| 2020 | 2 | |
| 2011 | 1 | |
| 2008 | 2 | |
| 2005 | 1 | |
| 2004 | 1 | |
| 2001 | 1 | |
| 2000 | 1 | |
| 1976 | 2 | |
| 1973 | 1 | |
| 1965 | 1 | |
Disaster Declarations
How the 13 FEMA declarations break into federal action codes (DR / EM / FM). Same DISTINCT grain as the table below.
Download these 13 declarations as CSV . FEMA source data is public domain; our derived presentation is CC0.
| DR# | Title | Type | Incident | Date |
|---|---|---|---|---|
| 4520 | COVID-19 PANDEMIC | DR | Biological | 2020-04-04 |
| 3454 | COVID-19 | EM | Biological | 2020-03-13 |
| 1966 | SEVERE WINTER STORM AND SNOWSTORM | DR | Snowstorm | 2011-04-05 |
| 1768 | SEVERE STORMS, TORNADOES, AND FLOODING | DR | Severe Storm | 2008-06-14 |
| 3285 | RECORD SNOW AND NEAR RECORD SNOW | EM | Snowstorm | 2008-03-19 |
| 3249 | HURRICANE KATRINA EVACUATION | EM | Hurricane | 2005-09-13 |
| 1526 | SEVERE STORMS AND FLOODING | DR | Severe Storm | 2004-06-18 |
| 3163 | SNOW | EM | Snowstorm | 2001-01-24 |
| 1332 | SEVERE STORMS, TORNADOES, AND FLOODING | DR | Severe Storm | 2000-06-24 |
| 3014 | DROUGHT | EM | Drought | 1976-06-17 |
| 496 | SEVERE STORMS, ICING, WIND & FLOODING | DR | Flood | 1976-03-23 |
| 376 | SEVERE STORMS & FLOODING | DR | Flood | 1973-04-27 |
| 192 | TORNADOES, SEVERE STORMS & FLOODING | DR | Tornado | 1965-04-21 |
Storm Events in Wisconsin
Statewide NOAA context only. PlainHazard does not currently attribute these state totals to Walworth County.
| Storm Type | Events | Fatalities | Injuries | Property Damage |
|---|---|---|---|---|
| Thunderstorm Wind | 3,504 | 5 | 23 | $45.0M |
| Hail | 2,620 | 0 | 0 | $57.8M |
| Winter Weather | 1,939 | 43 | 152 | $2.1M |
| Winter Storm | 1,338 | 15 | 86 | $2.3M |
| Flood | 740 | 12 | 4 | $115.6M |
Source: NOAA Storm Events Database State-level aggregated data, 2015-2025
NFIP Flood Insurance Claims
Total Claims
46
Total Paid
$635.1K
Avg Per Claim
$13.8K
Source: FEMA National Flood Insurance Program (NFIP) OpenFEMA Claims Data
FEMA National Risk Index
Overall Risk
Relatively Low
Score: 74.8/100
Expected Annual Loss
Relatively Low
$39.7M/year
Social Vulnerability
Relatively Low
Community Resilience
Very High
Hazard Risk Breakdown
Hail Relatively High
Tornado Relatively Moderate
Cold Wave Relatively Moderate
Strong Wind Relatively Moderate
Lightning Relatively Moderate
Heat Wave Relatively Low
Riverine Flooding Relatively Moderate
Landslide Relatively Low
Winter Weather Relatively Low
Earthquake Very Low
Ice Storm Relatively Low
Drought Relatively Low
Wildfire Very Low
Hurricane Very Low
Source: FEMA National Risk Index (NRI) Ratings reflect relative scores among all US counties. Data: hazards.fema.gov/nri
The model's sharpest exposure here: Hail
Hail is among the most expensive hazards in the model relative to how little it threatens life. It concentrates on roofs, vehicles and crops, and a single severe storm can generate an insurance loss across a metropolitan area without a single injury.
For Walworth County the two measures on this page point the same way: Hail is the county's highest-rated modeled hazard (Relatively High), and Severe Storm declarations also lead its federal record. Where the model and the declaration history agree, the reading is comparatively straightforward, the hazard is both expected and repeatedly realised.
National Risk Index ratings are modeled estimates of expected annual loss, not predictions of what will happen in any given year.
Data-matched county comparisons
Walworth County's closest FEMA peer: St. Francis County, AR
Comparisons use published FEMA declaration fields plus the National Risk Index composite for Walworth County. Record similarity, not a safety rating.
Similar modeled NRI score
Walworth County: NRI composite 74.8 (Relatively Low).
Similar Major-disaster share
Walworth County: 8 of 13 of its declarations are Major.
Closest declaration profiles
Walworth County shows 13 FEMA declarations, led by Severe Storm.
How these peers are chosen
Cohort: Published U.S. county equivalents outside the source state or territory. Each metric keeps six ETL candidates; three unique destinations are shown after de-duplicating across axes. Declaration-volume ranking combines count and Major-disaster share and prefers a different leading incident type; Major-share ranks the Major fraction adjusted for volume; NRI ranks the modeled composite score only.
Retained FEMA snapshot feed for Walworth County - capture-dated entries only.
Further reading for this county
Most disaster-prone counties
With 13 FEMA declarations, Walworth County sits in the high-volume declaration band - see how that count ranks against other U.S. counties.
More PlainHazard guides
- Most disaster-prone counties - U.S. counties ranked by FEMA declaration totals.
- Understanding disaster data - declarations vs storm events vs NRI scores.
- Preparing for natural disasters - household checklist (not county-specific advice).
Related
Frequently Asked Questions
What is the most common disaster type in Walworth County?
The most common disaster type in Walworth County is Severe Storm, with 3 declarations. Other disaster types include Snowstorm (3), Biological (2), Flood (2).
How does Walworth County's FEMA declaration record compare with the Wisconsin average?
FEMA lists 13 declaration records for Walworth County. That is 6% above the Wisconsin county mean of 12.3. Its count is also 37% below the national county mean of 20.7. A larger declaration history records more federal actions; it is not a forecast of the county's next hazard.
How many major FEMA disaster declarations has Walworth County received?
Walworth County has received 8 major disaster declarations, representing 62% of all 13 disaster declarations.
How many flood insurance claims has Walworth County filed?
Walworth County has 46 National Flood Insurance Program (NFIP) claims totaling $635.1K in payments, with an average of $13.8K per claim.
Does FEMA's top risk-rated hazard match the highest Expected Annual Loss in Walworth County?
No. In Walworth County, Hail has the highest National Risk Index rating (Relatively High), while Riverine Flooding leads Expected Annual Loss at about $17.6M. FEMA's risk score and dollar-loss model use different inputs, so the leaders often differ.
What was the worst year for disasters in Walworth County?
The most active year for disaster declarations in Walworth County was 1976, with 2 declarations. The county has FEMA disaster data spanning 1965 to 2020.
What is the FEMA National Risk Index score for Walworth County?
According to the FEMA National Risk Index, Walworth County, Wisconsin has an overall risk score of 74.8 out of 100 (Relatively Low). The county's social vulnerability rating is Relatively Low and community resilience is Very High. The Expected Annual Loss (EAL) score is Relatively Low, representing $39.7M in annualized losses.
Which natural hazard poses the greatest risk to Walworth County?
FEMA's NRI data points to Walworth County is Hail (risk rating: Relatively High). Other significant hazards include Tornado (Relatively Moderate) and Cold Wave (Relatively Moderate). FEMA's modeled event frequency puts hail here at an average of 4.4 times per year, drawn from 168 historical events on record. FEMA derives these ratings from historical event frequency, the assets exposed, and the community's vulnerability profile.
Data Sources & Methodology
Disaster declaration data comes from the FEMA OpenFEMA Disaster Declarations Summaries v2 API, which includes all federally declared disasters, emergencies, and fire management assistance grants.
Storm event data is sourced from the NOAA Storm Events Database (2015-2025), which tracks significant weather events including thunderstorms, tornadoes, floods, and winter storms.
Flood insurance data comes from the FEMA National Flood Insurance Program (NFIP) OpenFEMA claims dataset.
This data is provided for informational purposes only. FEMA disaster declarations represent federal response actions and may not capture all local emergencies or weather events.
What this means for Walworth County
Walworth County, WI has 13 federal declaration records, 6% more than the Wisconsin county mean of 12; its history sits in PlainHazard's high activity band.
- Within this above-state-average declaration file, major disaster leads with 8 of 13 records; the category describes past federal action, not the next likely hazard. Wisconsin overview
- The state benchmark and national rank point the same way: this count tops the Wisconsin mean and the totals for 17% of 3,266 U.S. counties. Most-disaster rankings
- A short NFIP claims file cannot establish low flood exposure; the data guide explains the limits of each federal measure. Disaster-data guide
An above-average declaration count records past federal responses; it does not predict the next event. Current warnings come from the National Weather Service and local emergency officials.
PlainHazard derives this profile from FEMA's Disaster Declarations Summaries and National Risk Index data. The declaration comparison covers 3,266 U.S. counties and county equivalents in this database, refreshed as of 2026-08-03. Read our methodology - how this data is sourced, computed, and verified.
All federal data sources used on this page
- FEMA OpenFEMA, Disaster Declarations Summaries v2 - all federally-declared disasters for this county. fema.gov/openfema/disaster-declarations
- FEMA National Risk Index (NRI) - per-county per-hazard risk ratings and expected annual loss. hazards.fema.gov/nri
- NOAA NCEI Storm Events Database - state-level storm/severe-weather event records, 2015-2025. ncdc.noaa.gov/stormevents
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainHazard Editorial
Verify with FEMA → · Verify with FEMA NRI → · Verify with NOAA →
Every figure on PlainHazard is rendered directly from FEMA federal disaster data, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or national statistics report, the data & editorial changelog, or report a data error.