FEMA Records
5
Total declarations
Iowa · FEMA + NOAA + National Risk Index
Harrison County, IA
5 FEMA disaster declarations (2020–2025), with a FEMA National Risk Index rating of Very Low. Most common hazard: Severe Storm.
- 5
- FEMA declarations
- 5
- Major disasters
- 31
- NRI risk · Very Low
- Severe Storm
- Top hazard
The verdict
Harrison County ranks safer than 31% of U.S. counties for FEMA-modeled hazard risk, with more federally declared disasters than 71% of the 2,791 counties FEMA tracks. FEMA rates the county's overall risk as Very Low, based on 5 federal disaster declarations recorded since 2020, most often severe storm, 30% above the national county average of 4.
- Safer than 31%
- of U.S. counties for FEMA National Risk Index score
- Very Low
- FEMA National Risk Index rating
- 5
- FEMA declarations vs 4 national county avg
- 2
- severe storm declarations, the most common hazard here
FEMA's National Risk Index score reflects expected annual loss, social vulnerability, and community resilience; the declaration count above reflects only Presidentially declared disasters, not every hazard event.
How does Harrison County compare?
Harrison County vs. every U.S. county
FEMA disaster declarations, all-time
5 Top 29% higher than 71% of 2,791 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 · 2026-07-25
Harrison County's FEMA Risk Index score
FEMA National Risk Index composite score vs. the Iowa county average
How disaster-prone is Harrison County?
Declaration frequency
Harrison County, Iowa has recorded 5 FEMA disaster declarations between 2020 and 2025, of which 5 were classified as Major Disaster declarations (DR) requiring federal individual and public assistance. That puts the county's average at 1.0 declarations per year across a 5-year record, or roughly 145% above the Iowa county average of 2.0 and 30% above the national county average of 3.8. The dominant disaster type on record is Severe Storm, with 2 of 5 declarations falling under this category.
FEMA National Risk Index
FEMA's data shows an elevated National Risk Index composite of 31.3/100 for this county (Very Low rating). Expected Annual Loss comes in at Very Low (roughly $9.8M 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, Drought carries the county's highest rating, a mid-range Relatively Moderate.
Flood exposure & the bottom line
Taken together, these indicators put Harrison County at a moderate relative risk level, not the calmest county on record, but not among the most disaster-prone either.
Risk Assessment
Risk Level
Moderate
vs. Iowa Avg
+145%
State avg: 2.0
vs. National Avg
+30%
National avg: 3.8
Avg Per Year
1.0
Over 5 years
FEMA NRI 8-hazard radar - Harrison County
How to read this radar
The radar plots Harrison County's relative exposure to the eight headline natural hazards used by the FEMA National Risk Index. Each axis is the qualitative NRI risk rating (Very Low through Very High) re-expressed on a 0-100 scale so that the polygon shape lets you compare a county against another at a glance. A rounder polygon means broad multi-hazard exposure; a spiky polygon means one or two dominant hazards drive most of the modeled risk.
NRI Source
FEMA 2023
Latest NRI release
County FIPS
19085
IA state code
Source: FEMA National Risk Index FEMA National Risk Index Per-county per-hazard ratings, 2023 release
Disaster Types
Severe Storm 2
Winter Storm 1
Tornado 1
Biological 1
Declaration Types
What DR / EM / FM mean
FEMA categorizes declarations as Major Disasters (DR), Emergencies (EM), or Fire Management Assistance (FM).
Major Disaster - 5 100.0%
of all 5 declarations
FEMA Declarations Timeline
| Year | Declarations | |
|---|---|---|
| 2025 | 1 | |
| 2024 | 3 | |
| 2020 | 1 | |
Disaster Declarations
| DR# | Title | Type | Incident | Date |
|---|---|---|---|---|
| 4870 | SEVERE WINTER STORM | DR | Winter Storm | 2025-05-21 |
| 4796 | SEVERE STORMS, FLOODING, STRAIGHT-LINE WINDS, AND TORNADOES | DR | Severe Storm | 2024-06-24 |
| 4784 | SEVERE STORMS, TORNADOES, AND FLOODING | DR | Severe Storm | 2024-05-24 |
| 4779 | SEVERE STORMS AND TORNADOES | DR | Tornado | 2024-05-14 |
| 4483 | COVID-19 PANDEMIC | DR | Biological | 2020-03-23 |
Storm Events in Iowa
| Storm Type | Events | Fatalities | Injuries | Property Damage |
|---|---|---|---|---|
| Thunderstorm Wind | 5,814 | 7 | 229 | $42.7M |
| Hail | 4,239 | 0 | 0 | $4.4M |
| Heavy Rain | 2,554 | 0 | 0 | $292.0K |
| Drought | 1,768 | 0 | 0 | $0 |
| Winter Storm | 1,764 | 3 | 4 | $2.8M |
Source: NOAA Storm Events Database NOAA Storm Events Database State-level aggregated data, 2015–2025
FEMA National Risk Index
Overall Risk
Very Low
Score: 31.3/100
Expected Annual Loss
Very Low
$9.8M/year
Social Vulnerability
Relatively Moderate
Community Resilience
Relatively High
Hazard Risk Breakdown
Drought Relatively Moderate
Hail Relatively Moderate
Landslide Relatively Low
Tornado Relatively Low
Wildfire Very Low
Strong Wind Relatively Moderate
Ice Storm Relatively Low
Winter Weather Relatively Low
Cold Wave Relatively Low
Heat Wave Very Low
Lightning Very Low
Earthquake Very Low
Hurricane No Rating
Source: FEMA National Risk Index (NRI) FEMA National Risk Index (NRI) Ratings reflect relative scores among all US counties. Data: hazards.fema.gov/nri
Counties with Similar Risk in Iowa
Disaster Preparedness Guides
Related
Frequently Asked Questions
How many natural disasters has Harrison County, Iowa had?
Harrison County, Iowa has received 5 FEMA disaster declarations from 2020 to 2025. Of these, 5 were major disaster declarations.
What is the most common disaster type in Harrison County?
The most common disaster type in Harrison County is Severe Storm, with 2 declarations. Other disaster types include Winter Storm (1), Tornado (1), Biological (1).
How does Harrison County's disaster risk compare to the Iowa average?
Harrison County has 5 disaster declarations, which is 145% higher than the Iowa county average of 2.0 declarations. Compared to the national county average of 3.8, it is 30% higher.
How many major FEMA disaster declarations has Harrison County received?
Harrison County has received 5 major disaster declarations, representing 100% of all 5 disaster declarations. Major disaster declarations typically involve significant damage requiring federal assistance.
What types of storms are most common in Iowa?
The most common storm types in Iowa include Thunderstorm Wind (5,814 events), Hail (4,239 events), Heavy Rain (2,554 events). NOAA storm event data covers severe weather from 2015 to 2025.
What was the worst year for disasters in Harrison County?
The most active year for disaster declarations in Harrison County was 2024, with 3 declarations. The county has FEMA disaster data spanning 2020 to 2025.
What is the overall disaster risk level for Harrison County?
With 5 FEMA disaster declarations on record, Harrison County lands in the moderate-risk band, not unusually disaster-prone, but not spared either.
What is the FEMA National Risk Index score for Harrison County?
According to the FEMA National Risk Index, Harrison County, Iowa has an overall risk score of 31.3 out of 100 (Very Low). The county's social vulnerability rating is Relatively Moderate and community resilience is Relatively High. The Expected Annual Loss (EAL) score is Very Low, representing $9.8M 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 is Drought (risk rating: Relatively Moderate). Other significant hazards include Hail (Relatively Moderate) and Landslide (Relatively Low). These scores are based on FEMA's analysis of historical event frequency, exposed assets, and community vulnerability.
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.
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, IA runs 145% above the Iowa county average for federal disaster declarations (5 vs 2), a moderate historical load overall.
- Its most common federal declaration type is major disaster (5 of 5) - know the hazards most likely here before they happen. Iowa overview
- See how this county ranks against the rest of the country for disaster frequency. Most-disaster rankings
- Read how to read FEMA declarations, NRI risk scores, and what they do and don't tell you. Disaster-data guide
Historical declaration counts describe past federal response, not a forecast. For current threats, follow the National Weather Service and local officials; in an emergency call 911.
According to the Federal Emergency Management Agency, this profile draws on 2,791 tracked U.S. counties in FEMA's Disaster Declarations Summaries dataset, refreshed as of 2026-07-25. 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. This page draws directly on FEMA federal disaster data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or national statistics report, or report a data error.