FEMA Records
2
Total declarations
Minnesota · FEMA + NOAA + National Risk Index
Rock County, MN
2 FEMA disaster declarations (2022–2024), with a FEMA National Risk Index rating of Very Low. Most common hazard: Flood.
- 2
- FEMA declarations
- 2
- Major disasters
- 9
- NRI risk · Very Low
- Flood
- Top hazard
FEMA's National Risk Index places Rock County in the top 91% of U.S. counties for overall natural-hazard risk, and its FEMA disaster-declaration count is higher than 22% of all 2,729 counties tracked.
How does Rock County compare?
- Rock County
- 2
- Minnesota county avg
- 1.9
- National county avg
- 3.7
How disaster-prone is Rock County?
Rock County, Minnesota has recorded 2 FEMA disaster declarations between 2022 and 2024, of which 2 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 2-year record, or roughly 7% above the Minnesota county average of 1.9 and 47% below the national county average of 3.7.
The dominant disaster type on record is Flood, with 1 of 2 declarations falling under this category. FEMA's National Risk Index places this county in the low end of the national distribution, composite score 9.4/100 (Very Low). Expected Annual Loss is rated Very Low (roughly $6.6M in annualized losses). Two modifiers shape how that exposure becomes real-world harm here: social vulnerability (Very Low) and community resilience (Relatively High). Among the 18 modeled hazards, Hail carries the county's highest rating, a mid-range Relatively Moderate.
Taken together, Rock County reads as low relative risk on this historical lens, fewer federally recognized disasters than a typical U.S. county.
Risk Assessment
Risk Level
Low
vs. Minnesota Avg
+7%
State avg: 1.9
vs. National Avg
-47%
National avg: 3.7
Avg Per Year
1.0
Over 2 years
FEMA NRI 8-hazard radar - Rock County
How to read this radar
The radar plots Rock 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
27133
MN state code
Source: FEMA National Risk Index FEMA National Risk Index Per-county per-hazard ratings, 2023 release
Disaster Types
Flood 1
Severe Storm 1
Declaration Types
What DR / EM / FM mean
FEMA categorizes declarations as Major Disasters (DR), Emergencies (EM), or Fire Management Assistance (FM).
Major Disaster - 2 100.0%
of all 2 declarations
FEMA Declarations Timeline
| Year | Declarations | |
|---|---|---|
| 2024 | 1 | |
| 2022 | 1 | |
Disaster Declarations
| DR# | Title | Type | Incident | Date |
|---|---|---|---|---|
| 4797 | SEVERE STORMS AND FLOODING | DR | Flood | 2024-06-28 |
| 4666 | SEVERE STORMS, STRAIGHT-LINE WINDS, TORNADOES, AND FLOODING | DR | Severe Storm | 2022-08-09 |
Storm Events in Minnesota
| Storm Type | Events | Fatalities | Injuries | Property Damage |
|---|---|---|---|---|
| Thunderstorm Wind | 4,835 | 13 | 26 | $84.5M |
| Hail | 4,465 | 0 | 0 | $34.5M |
| Extreme Cold/Wind Chill | 2,009 | 7 | 4 | $55.0K |
| Winter Storm | 1,812 | 2 | 20 | $10.1M |
| Heavy Snow | 1,302 | 10 | 14 | $1.0M |
Source: NOAA Storm Events Database NOAA Storm Events Database State-level aggregated data, 2015–2025
FEMA National Risk Index
Overall Risk
Very Low
Score: 9.4/100
Expected Annual Loss
Very Low
$6.6M/year
Social Vulnerability
Very Low
Community Resilience
Relatively High
Hazard Risk Breakdown
Hail Relatively Moderate
Winter Weather Relatively Moderate
Drought Relatively Low
Ice Storm Relatively Low
Cold Wave Relatively Low
Tornado Relatively Low
Heat Wave Very Low
Strong Wind Relatively Low
Landslide Very Low
Wildfire Very Low
Earthquake Very Low
Lightning Very Low
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 Minnesota
Disaster Preparedness Guides
Related
Frequently Asked Questions
How many natural disasters has Rock County, Minnesota had?
Rock County, Minnesota has received 2 FEMA disaster declarations from 2022 to 2024. Of these, 2 were major disaster declarations.
What is the most common disaster type in Rock County?
The most common disaster type in Rock County is Flood, with 1 declaration. Other disaster types include Severe Storm (1).
How does Rock County's disaster risk compare to the Minnesota average?
Rock County has 2 disaster declarations, which is 7% higher than the Minnesota county average of 1.9 declarations. Compared to the national county average of 3.7, it is 47% lower.
How many major FEMA disaster declarations has Rock County received?
Rock County has received 2 major disaster declarations, representing 100% of all 2 disaster declarations. Major disaster declarations typically involve significant damage requiring federal assistance.
What types of storms are most common in Minnesota?
The most common storm types in Minnesota include Thunderstorm Wind (4,835 events), Hail (4,465 events), Extreme Cold/Wind Chill (2,009 events). NOAA storm event data covers severe weather from 2015 to 2025.
What was the worst year for disasters in Rock County?
The most active year for disaster declarations in Rock County was 2022, with 1 declaration. The county has FEMA disaster data spanning 2022 to 2024.
What is the overall disaster risk level for Rock County?
Rock County's 2 FEMA disaster declarations put it in the low-risk band, fewer federally recognized disasters than a typical U.S. county over the same span.
What is the FEMA National Risk Index score for Rock County?
According to the FEMA National Risk Index, Rock County, Minnesota has an overall risk score of 9.4 out of 100 (Very Low). The county's social vulnerability rating is Very Low and community resilience is Relatively High. The Expected Annual Loss (EAL) score is Very Low, representing $6.6M in annualized losses.
Which natural hazard poses the greatest risk to Rock County?
Based on FEMA NRI data, the highest-risk natural hazard in Rock County is Hail (risk rating: Relatively Moderate). Other significant hazards include Winter Weather (Relatively Moderate) and Drought (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 Rock County
Rock County, MN has 2 FEMA disaster declarations on record, a low historical disaster load, 7% above the Minnesota county average.
- Its most common federal declaration type is major disaster (2 of 2) - know the hazards most likely here before they happen. Minnesota 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.
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 report a data error.