FEMA Records
18
Below median
Ohio · FEMA + NOAA + National Risk Index
Harrison County, OH
18 FEMA disaster declarations (1965-2020), with a FEMA National Risk Index rating of Very Low. Most common hazard: Severe Storm.
- 18
- FEMA declarations
- 13
- Major disasters
- 11
- NRI risk · Very Low
- Severe Storm
- Top hazard
The verdict
Two federal records point in the busier direction for Harrison County. Its 18 FEMA declarations are 23% above the Ohio county mean and exceed the count for 37% of the 3,266 counties in this registry. Separately, FEMA's National Risk Index places it safer than 11%, based on modeled expected annual loss, social vulnerability, and community resilience.
- Safer than 11%
- of U.S. counties for FEMA National Risk Index score
- Very Low
- FEMA National Risk Index rating
- 18
- FEMA declarations vs 21 national county avg
- 90
- 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 Harrison County compare?
Harrison County vs. all counties in this dataset
FEMA disaster declarations, all-time
18 37th percentile higher than 37% 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
Harrison 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 Harrison County is led by Riverine Flooding (about $2.5M Expected Annual Loss, Historical Loss Ratio Relatively Moderate), while Landslide carries the highest National Risk Index rating (Relatively Low). 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 Harrison County's hazard record show?
Reading the federal records together
The NFIP claims register shows a middle-volume loss record here: 90 paid claims, totaling $527.4K. PlainHazard uses 50-499 claims for this descriptive band; FEMA does not publish it as a safety or coverage category. The $5.9K average describes payments on recorded claims only, leaving uninsured damage and properties without a claim outside the measure.
The declaration register points in the busier direction. Harrison County's 18 federal records stand 23% above the Ohio county mean of 14.6. 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.
Declaration frequency
The FEMA register is busy by both local and national comparisons. It contains 18 entries for Harrison County, including 13 Major Disaster records, 23% above the Ohio county mean. Across the 55-year span, that works out to 0.3 declarations a year. Severe Storm leads the file with 10 entries. Declaration type records the federal action taken, not every assistance program approved.
FEMA National Risk Index
FEMA's National Risk Index places this county in the low end of the national distribution, composite score 11.4/100 (Very Low). Expected Annual Loss is rated Very Low (roughly $4.1M in annualized losses). Two modifiers shape how that exposure becomes real-world harm here: social vulnerability (Relatively High) and community resilience (Relatively Moderate). Even the county's top-rated hazard, Landslide, only reaches Relatively Low on FEMA's scale, none of the 18 modeled hazards stand out here. FEMA's modeled frequency puts that hazard at roughly once every 1 years here.
61 /100
Historical Activity Index
High historical activity
Harrison 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) Moderate
13/30
18 OpenFEMA declarations, full ingest window (0.9x national county average)
County Disaster Density High
15/25
18 declarations (1.2x state county average of 15)
Major Disaster Share High
18/25
13 of 18 declarations are major disasters (72%)
Hazard Diversity Very High
15/20
6 different disaster types declared in Harrison County
Historical Declaration Activity
Activity Band
High
vs. Ohio Avg
+23%
State avg: 14.6
vs. National Avg
-13%
National avg: 20.7
Avg Per Year
0.3
Over 55 years
FEMA NRI 8-hazard radar - Harrison 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
72%
Major-heavy
NRI risk score
11
Very Low
Source: FEMA National Risk Index Per-county per-hazard ratings, December 2025 release
How often does each hazard strike Harrison 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 |
|---|---|---|
| Landslide | Relatively Low | roughly once every 1 years |
| Strong Wind | Relatively Moderate | an average of 2.2 times per year |
| Drought | Relatively Low | 6.2 modeled event-days per year |
| Hail | Relatively Low | an average of 3.9 times per year |
| Lightning | Relatively Low | an average of 42 times per year |
| Hurricane | Very Low | roughly once every 147 years |
| Riverine Flooding | Very Low | an average of 1.4 times per year |
| Heat Wave | Very Low | 2.1 modeled event-days per year |
| Earthquake | Very Low | roughly once every 1,684 years |
| Ice Storm | Very Low | roughly once every 4 years |
| Tornado | Very Low | roughly once every 6 years |
| Wildfire | Very Low | roughly once every 9,354 years |
| Winter Weather | Very Low | an average of 9.7 times per year |
| Cold Wave | Very Low | an average of 2.8 times per year |
Source: FEMA National Risk Index Modeled annualized frequency; drought and heat wave use event-days/year, December 2025 release
Disaster Types
Severe Storm 10
Biological 2
Snowstorm 2
Tornado 2
Flood 1
Hurricane 1
What Severe Storm declarations mean here
Severe Storm is the most frequent declaration type on Harrison County's record, 56% 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 - 13 72.2%
of all 18 declarations
Emergency - 5 27.8%
of all 18 declarations
FEMA Declarations Timeline
| Year | Declarations | |
|---|---|---|
| 2020 | 2 | |
| 2018 | 1 | |
| 2012 | 2 | |
| 2009 | 1 | |
| 2005 | 2 | |
| 2004 | 3 | |
| 2003 | 1 | |
| 1998 | 1 | |
| 1990 | 1 | |
| 1978 | 1 | |
| 1977 | 1 | |
| 1969 | 1 | |
| 1965 | 1 | |
Disaster Declarations
How the 18 FEMA declarations break into federal action codes (DR / EM / FM). Same DISTINCT grain as the table below.
Download these 18 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 |
| 4360 | SEVERE STORMS, LANDSLIDES, AND MUDSLIDES | DR | Flood | 2018-04-17 |
| 4077 | SEVERE STORMS AND STRAIGHT-LINE WINDS | DR | Severe Storm | 2012-08-20 |
| 3346 | SEVERE STORMS | EM | Severe Storm | 2012-06-30 |
| 1805 | SEVERE WIND STORM ASSOCIATED WITH TROPICAL DEPRESSION IKE | DR | Severe Storm | 2008-10-24 |
| 3250 | HURRICANE KATRINA EVACUATION | EM | Hurricane | 2005-09-13 |
| 1580 | SEVERE WINTER STORMS, FLOODING, AND MUDSLIDES | DR | Severe Storm | 2005-02-15 |
| 1556 | SEVERE STORMS AND FLOODING | DR | Severe Storm | 2004-09-19 |
| 1519 | SEVERE STORMS AND FLOODING | DR | Severe Storm | 2004-06-03 |
| 1507 | SEVERE STORMS, FLOODING, MUDSLIDES, AND LANDSLIDES | DR | Severe Storm | 2004-01-26 |
| 1453 | SEVERE WINTER STORM AND RECORD/NEAR RECORD SNOW | DR | Severe Storm | 2003-03-14 |
| 1227 | SEVERE STORMS, FLOODING, AND TORNADOES | DR | Severe Storm | 1998-06-30 |
| 870 | SEVERE STORMS, TORNADOES & FLOODING | DR | Severe Storm | 1990-06-06 |
| 3055 | BLIZZARDS & SNOWSTORMS | EM | Snowstorm | 1978-01-26 |
| 3029 | SNOWSTORMS | EM | Snowstorm | 1977-02-02 |
| 266 | TORNADOES, SEVERE STORMS & FLOODING | DR | Tornado | 1969-07-15 |
| 191 | TORNADOES & SEVERE STORMS | DR | Tornado | 1965-04-14 |
Storm Events in Ohio
Statewide NOAA context only. PlainHazard does not currently attribute these state totals to Harrison 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
90
Total Paid
$527.4K
Avg Per Claim
$5.9K
Source: FEMA National Flood Insurance Program (NFIP) OpenFEMA Claims Data
FEMA National Risk Index
Overall Risk
Very Low
Score: 11.4/100
Expected Annual Loss
Very Low
$4.1M/year
Social Vulnerability
Relatively High
Community Resilience
Relatively Moderate
Hazard Risk Breakdown
Landslide Relatively Low
Strong Wind Relatively Moderate
Drought Relatively Low
Hail Relatively Low
Lightning Relatively Low
Hurricane Very Low
Riverine Flooding Very Low
Heat Wave Very Low
Earthquake Very Low
Ice Storm Very Low
Tornado Very Low
Wildfire Very Low
Winter Weather Very Low
Cold Wave 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: Landslide
Landslide risk is a function of slope, soil and water, so it is usually a SECOND-ORDER hazard: it is triggered by the rainfall, snowmelt, wildfire burn scars or seismic shaking that came first. That is why a county can carry high landslide exposure whose realized damage is recorded under a flood or storm declaration instead.
Worth noting for Harrison County: the model and the federal record do NOT point at the same hazard. Landslide carries the highest modeled rating (Relatively Low), while the county's declaration history is led by Severe Storm. 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
Harrison County's closest FEMA peer: Allegheny County, PA
Comparisons use published FEMA declaration fields plus the National Risk Index composite for Harrison County. Record similarity, not a safety rating.
Closest declaration profiles
Harrison County shows 18 FEMA declarations, led by Severe Storm.
Similar Major-disaster share
Harrison County: 13 of 18 of its declarations are Major.
Similar modeled NRI score
Harrison County: NRI composite 11.4 (Very 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 Harrison County - capture-dated entries only.
Further reading for this county
Understanding disaster data
Harrison County's NFIP claims file (90 claims) and FEMA declaration history measure different federal records - this guide separates them from modeled NRI risk.
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 Harrison County?
The most common disaster type in Harrison County is Severe Storm, with 10 declarations. Other disaster types include Biological (2), Snowstorm (2), Tornado (2).
How does Harrison County's FEMA declaration record compare with the Ohio average?
FEMA lists 18 declaration records for Harrison County. That is 23% above the Ohio county mean of 14.6. Its count is also 13% 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 Harrison County received?
Harrison County has received 13 major disaster declarations, representing 72% of all 18 disaster declarations.
How many flood insurance claims has Harrison County filed?
Harrison County has 90 National Flood Insurance Program (NFIP) claims totaling $527.4K in payments, with an average of $5.9K per claim.
Does FEMA's top risk-rated hazard match the highest Expected Annual Loss in Harrison County?
No. In Harrison County, Landslide has the highest National Risk Index rating (Relatively Low), while Riverine Flooding leads Expected Annual Loss at about $2.5M. FEMA's risk score and dollar-loss model use different inputs, so the leaders often differ.
What was the worst year for disasters in Harrison County?
The most active year for disaster declarations in Harrison County was 2004, with 3 declarations. The county has FEMA disaster data spanning 1965 to 2020.
What is the FEMA National Risk Index score for Harrison County?
According to the FEMA National Risk Index, Harrison County, Ohio has an overall risk score of 11.4 out of 100 (Very Low). The county's social vulnerability rating is Relatively High and community resilience is Relatively Moderate. The Expected Annual Loss (EAL) score is Very Low, representing $4.1M in annualized losses.
Which natural hazard poses the greatest risk to Harrison County?
Based on FEMA NRI data, the highest-risk natural hazard in Harrison County as of the latest release is Landslide (risk rating: Relatively Low). Other significant hazards include Strong Wind (Relatively Moderate) and Drought (Relatively Low). FEMA's modeled event frequency puts landslide here at roughly once every 1 years. 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 Harrison County
Harrison County, OH has 18 federal declaration records, 23% more than the Ohio county mean of 15; its history sits in PlainHazard's high activity band.
- Within this above-state-average declaration file, major disaster leads with 13 of 18 records; the category describes past federal action, not the next likely hazard. Ohio overview
- The state benchmark and national rank point the same way: this count tops the Ohio mean and the totals for 37% of 3,266 U.S. counties. Most-disaster rankings
- Use the data guide to separate this mid-volume insurance-claims file from declaration counts and modeled NRI risk. 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.