FEMA Records
8
Low volume
Ohio · FEMA + NOAA + National Risk Index
Williams County, OH
8 FEMA disaster declarations (1978-2020), with a FEMA National Risk Index rating of Relatively Low. Most common hazard: Flood.
- 8
- FEMA declarations
- 4
- Major disasters
- 44
- NRI risk · Relatively Low
- Flood
- Top hazard
The verdict
Start with the local benchmark for Williams County: 8 FEMA declaration records are 45% below the Ohio county mean, even though the count is higher than 6% of counties in the national registry. On FEMA's distinct National Risk Index model, which combines expected loss with vulnerability and resilience, the county ranks safer than 44%.
- Safer than 44%
- of U.S. counties for FEMA National Risk Index score
- Relatively Low
- FEMA National Risk Index rating
- 8
- FEMA declarations vs 21 national county avg
- 32
- 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 Williams County compare?
Williams County vs. all counties in this dataset
FEMA disaster declarations, all-time
8 6th percentile higher than 6% 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
Williams County's FEMA Risk Index score
FEMA National Risk Index composite score vs. the Ohio county average
Which hazard drives modeled loss here?
FEMA's modeled annual dollar loss for Williams County is led by Riverine Flooding (about $6.2M Expected Annual Loss, Historical Loss Ratio Relatively Moderate), while Strong Wind carries the highest National Risk Index rating (Relatively Moderate). 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 Williams County's hazard record show?
FEMA National Risk Index
FEMA's data shows an elevated National Risk Index composite of 44.4/100 for this county (Relatively Low rating). Expected Annual Loss comes in at Very Low (roughly $12.5M in annualized losses). Social vulnerability (Relatively Moderate) and community resilience (Relatively High) both factor into how that raw exposure plays out on the ground. Among the 18 modeled hazards, Strong Wind carries the county's highest rating, a mid-range Relatively Moderate. FEMA's modeled frequency puts that hazard at an average of 5.1 times per year here, based on 196 historical events on record.
Declaration frequency
The state comparison is the clearest context for Williams County's moderate federal record. Its 8 declarations sit 45% below the Ohio county mean, with 4 Major Disaster entries among them. 2 records concern Flood, the file's most frequent incident type. Spread across 42 years, the registry rate is 0.2 per year. FEMA reports authorized programs separately from the DR, EM, and FM codes.
Reading the federal records together
This county has a small entry in FEMA's NFIP paid-claims table: 32 claims and $763.8K 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.
Start with the state benchmark: a Ohio county averages 14.6 federal declaration records, while Williams County has 8. The gap is 45% below that mean. Fewer entries indicate a quieter history of recorded federal actions, not immunity from a hazard and not a prediction about what happens next.
39 /100
Historical Activity Index
Moderate historical activity
Williams County, OH · 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) Low
6/30
8 OpenFEMA declarations, full ingest window (0.4x national county average)
County Disaster Density Moderate
7/25
8 declarations (0.5x state county average of 15)
Major Disaster Share High
13/25
4 of 8 declarations are major disasters (50%)
Hazard Diversity High
13/20
5 different disaster types declared in Williams County
Historical Declaration Activity
Activity Band
Moderate
vs. Ohio Avg
-45%
State avg: 14.6
vs. National Avg
-61%
National avg: 20.7
Avg Per Year
0.2
Over 42 years
FEMA NRI 8-hazard radar - Williams 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
50%
Major-heavy
NRI risk score
44
Relatively Low
Source: FEMA National Risk Index Per-county per-hazard ratings, December 2025 release
How often does each hazard strike Williams 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 |
|---|---|---|
| Strong Wind | Relatively Moderate | an average of 5.1 times per year |
| Tornado | Relatively Moderate | roughly once every 5 years |
| Hail | Relatively Moderate | an average of 3.3 times per year |
| Earthquake | Relatively Low | roughly once every 806 years |
| Ice Storm | Relatively Moderate | an average of 1.6 times per year |
| Riverine Flooding | Relatively Low | roughly once every 5 years |
| Cold Wave | Relatively Low | an average of 3.3 times per year |
| Drought | Relatively Low | 1 modeled event-day per year |
| Lightning | Relatively Low | an average of 38 times per year |
| Landslide | Very Low | roughly once every 13 years |
| Winter Weather | Relatively Low | an average of 11 times per year |
| Heat Wave | Very Low | 4 modeled event-days per year |
| Hurricane | Very Low | roughly once every 124 years |
| Wildfire | Very Low | roughly once every 82,682 years |
Source: FEMA National Risk Index Modeled annualized frequency; drought and heat wave use event-days/year, December 2025 release
Disaster Types
Biological 2
Severe Storm 2
Flood 2
Hurricane 1
Snowstorm 1
What Flood declarations mean here
Flood is the most frequent declaration type on Williams County's record, 25% of its declarations. Federal flood declarations cover two mechanisms that behave very differently: riverine flooding, which builds over days as a watershed drains and is usually forecast well in advance, and flash flooding, which can arrive in under an hour from rainfall that fell somewhere upstream.
Flood is also the one hazard class where a second federal dataset exists for the same events. The National Flood Insurance Program records what was actually paid on insured losses, so it measures a narrower thing than the declaration count: uninsured damage, and flooding outside mapped special flood hazard areas, never enters it. Reading the two together is more informative than either alone.
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 - 4 50.0%
of all 8 declarations
Emergency - 4 50.0%
of all 8 declarations
FEMA Declarations Timeline
| Year | Declarations | |
|---|---|---|
| 2020 | 2 | |
| 2012 | 1 | |
| 2005 | 1 | |
| 2004 | 1 | |
| 1996 | 1 | |
| 1982 | 1 | |
| 1978 | 1 | |
Disaster Declarations
How the 8 FEMA declarations break into federal action codes (DR / EM / FM). Same DISTINCT grain as the table below.
Download these 8 declarations as CSV . FEMA source data is public domain; our derived presentation is CC0.
| DR# | Title | Type | Incident | Date |
|---|---|---|---|---|
| 4507 | COVID-19 PANDEMIC | DR | Biological | 2020-03-31 |
| 3457 | COVID-19 | EM | Biological | 2020-03-13 |
| 3346 | SEVERE STORMS | EM | Severe Storm | 2012-06-30 |
| 3250 | HURRICANE KATRINA EVACUATION | EM | Hurricane | 2005-09-13 |
| 1556 | SEVERE STORMS AND FLOODING | DR | Severe Storm | 2004-09-19 |
| 1122 | FLOODING | DR | Flood | 1996-06-24 |
| 653 | SEVERE STORMS & FLOODING | DR | Flood | 1982-03-26 |
| 3055 | BLIZZARDS & SNOWSTORMS | EM | Snowstorm | 1978-01-26 |
Storm Events in Ohio
Statewide NOAA context only. PlainHazard does not currently attribute these state totals to Williams County.
| Storm Type | Events | Fatalities | Injuries | Property Damage |
|---|---|---|---|---|
| Thunderstorm Wind | 6,938 | 6 | 39 | $60.4M |
| Winter Weather | 2,101 | 7 | 42 | $3.3M |
| Hail | 1,749 | 0 | 0 | $673.5K |
| Flood | 1,607 | 9 | 0 | $84.5M |
| Flash Flood | 1,089 | 9 | 7 | $112.2M |
Source: NOAA Storm Events Database State-level aggregated data, 2015-2025
NFIP Flood Insurance Claims
Total Claims
32
Total Paid
$763.8K
Avg Per Claim
$23.9K
Source: FEMA National Flood Insurance Program (NFIP) OpenFEMA Claims Data
FEMA National Risk Index
Overall Risk
Relatively Low
Score: 44.4/100
Expected Annual Loss
Very Low
$12.5M/year
Social Vulnerability
Relatively Moderate
Community Resilience
Relatively High
Hazard Risk Breakdown
Strong Wind Relatively Moderate
Tornado Relatively Moderate
Hail Relatively Moderate
Earthquake Relatively Low
Ice Storm Relatively Moderate
Riverine Flooding Relatively Low
Cold Wave Relatively Low
Drought Relatively Low
Lightning Relatively Low
Landslide Very Low
Winter Weather Relatively Low
Heat Wave Very Low
Hurricane Very Low
Wildfire 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: Strong Wind
Strong Wind covers damaging non-thunderstorm, non-tornadic wind, the kind produced by steep pressure gradients and downslope events. It is a broad, frequent, low-drama hazard: roofs, signage, power lines and high-profile vehicles, spread across a wide area rather than concentrated on a path.
Worth noting for Williams County: the model and the federal record do NOT point at the same hazard. Strong Wind carries the highest modeled rating (Relatively Moderate), while the county's declaration history is led by Flood. That is not a contradiction, the two measure genuinely different things. Declarations record federal ACTION, which requires damage costly enough to exceed state and local capacity; the Risk Index models EXPECTED annual loss across all 18 hazards whether or not any declaration ever followed. A hazard can be the county's largest modeled exposure and never once have driven a declaration.
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
Williams County's closest FEMA peer: Harding County, NM
Comparisons use published FEMA declaration fields plus the National Risk Index composite for Williams County. Record similarity, not a safety rating.
Closest declaration profiles
Williams County shows 8 FEMA declarations, led by Flood.
Similar Major-disaster share
Williams County: 4 of 8 of its declarations are Major.
Similar modeled NRI score
Williams County: NRI composite 44.4 (Relatively Low).
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 Williams County - capture-dated entries only.
Further reading for this county
Understanding disaster data
FEMA's National Risk Index flags Strong Wind as the top modeled exposure here (Relatively Moderate); the guide explains how that model differs from declaration counts.
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 Williams County?
The most common disaster type in Williams County is Flood, with 2 declarations. Other disaster types include Biological (2), Severe Storm (2), Hurricane (1).
How does Williams County's FEMA declaration record compare with the Ohio average?
The typical Ohio county has 14.6 FEMA declaration records; Williams County has 8, or 45% fewer. Against the national county mean of 20.7, this county's total is 61% lower. The comparison is historical and says nothing about the probability of a future event.
How many major FEMA disaster declarations has Williams County received?
Williams County has received 4 major disaster declarations, representing 50% of all 8 disaster declarations.
How many flood insurance claims has Williams County filed?
Williams County has 32 National Flood Insurance Program (NFIP) claims totaling $763.8K in payments, with an average of $23.9K per claim.
Does FEMA's top risk-rated hazard match the highest Expected Annual Loss in Williams County?
No. In Williams County, Strong Wind has the highest National Risk Index rating (Relatively Moderate), while Riverine Flooding leads Expected Annual Loss at about $6.2M. FEMA's risk score and dollar-loss model use different inputs, so the leaders often differ.
What was the worst year for disasters in Williams County?
The most active year for disaster declarations in Williams County was 2020, with 2 declarations. The county has FEMA disaster data spanning 1978 to 2020.
What is the FEMA National Risk Index score for Williams County?
According to the FEMA National Risk Index, Williams County, Ohio has an overall risk score of 44.4 out of 100 (Relatively Low). Social vulnerability here rates Relatively Moderate, while community resilience comes in at Relatively High. The Expected Annual Loss (EAL) score is Very Low, representing $12.5M in annualized losses.
Which natural hazard poses the greatest risk to Williams County?
The top hazard flagged by FEMA's NRI for Williams County is Strong Wind (risk rating: Relatively Moderate). Other significant hazards include Tornado (Relatively Moderate) and Hail (Relatively Moderate). FEMA's modeled event frequency puts strong wind here at an average of 5.1 times per year, drawn from 196 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 Williams County
Against a Ohio county mean of 15 declarations, Williams County, OH records 8, or 45% fewer. PlainHazard classifies that historical total as moderate activity.
- Major Disaster is the largest group (4 of 8) in a declaration history that remains below its state benchmark; frequency here is not a forecast. Ohio overview
- Nationally the county exceeds 6% of recorded county totals, but its own Ohio benchmark is higher. The ranking keeps those two contexts separate. 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
A below-average federal record is not a safety guarantee. Use National Weather Service alerts and local emergency-management notices for present conditions, not this historical comparison.
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.