FEMA Records
16
Below median
Minnesota · FEMA + NOAA + National Risk Index
Rock County, MN
16 FEMA disaster declarations (1969-2024), with a FEMA National Risk Index rating of Very Low. Most common hazard: Severe Storm.
- 16
- FEMA declarations
- 13
- Major disasters
- 9
- NRI risk · Very Low
- Severe Storm
- Top hazard
The verdict
Rock County has a nationally busy FEMA history: 16 declarations, more than 27% of counties in this registry. But the state comparison tempers that reading: the total is 10% below the Minnesota county mean. FEMA's separate National Risk Index places the county safer than 9%; that score models loss and vulnerability rather than counting declarations.
- Safer than 9%
- of U.S. counties for FEMA National Risk Index score
- Very Low
- FEMA National Risk Index rating
- 16
- FEMA declarations vs 21 national county avg
- 29
- 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.
FEMA OpenFEMA declaration desk
County FIPS 27133 · Rock County 16 declarations · rank 2285/3,266
DECL-MID · MAJOR-HEAVY · RANK-LOWER · PHOTO-FINISH · NRI-LOW · ACT-HIGH · TYPE-LEAD · VS-ST-BELOW
- DECL-MID 16
- MAJOR-HEAVY 81%
- RANK-LOWER #2,285
- PHOTO-FINISH Greene
- NRI-LOW Very Low
- ACT-HIGH High
- TYPE-LEAD Severe Storm
- VS-ST-BELOW -10%
Nearest declaration peer: Greene, GA (0 declaration gap)
FEMA Disaster Declarations Summaries v2 filing stamps for this county register. Read with this county → · Minnesota state profile
Rock County among counties with fewer federal records
FEMA declaration records among Rock County and nearest peers by total count
- Los Angeles · largest
Los Angeles · largest
88 declarations
- Frontier · near 16
Frontier · near
16 declarations
- Greene · near 16
Greene · near
16 declarations
- Rock · this county 16
Rock · this county
16 declarations
- Terrell · near 16
Terrell · near
16 declarations
- Ujelang · smallest 1
Ujelang · smallest
1 declarations
What this shows Rock County carries 16 FEMA declaration records, ranked 2285 of 3,266 counties in this registry.
Rock County versus quieter counties in this dataset
Rock County among lower-declaration counties nationally
FEMA disaster declarations, all-time · Rock County
16 27th percentile higher than 27% 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 · 2026-08-25
Rock County's FEMA Risk Index score
Which hazard drives modeled loss here?
FEMA's modeled annual dollar loss for Rock County is led by Riverine Flooding (about $2.6M Expected Annual Loss, Historical Loss Ratio Relatively Moderate), while Hail 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 Rock County's hazard record show?
FEMA National Risk Index
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. FEMA's modeled frequency puts that hazard at an average of 5.9 times per year here, based on 223 historical events on record.
Reading the federal records together
This county has a small entry in FEMA's NFIP paid-claims table: 29 claims and $162.1K 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.
Start with the state benchmark: a Minnesota county averages 17.7 federal declaration records, while Rock County has 16. The gap is 10% 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.
56 /100
Historical Activity Index
High historical activity
Rock County, MN · 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
12/30
16 OpenFEMA declarations, full ingest window (0.8x national county average)
County Disaster Density Moderate
11/25
16 declarations (0.9x state county average of 18)
Major Disaster Share Very High
20/25
13 of 16 declarations are major disasters (81%)
Hazard Diversity High
13/20
5 different disaster types declared in Rock County
FEMA NRI 8-hazard radar - Rock 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
81%
Mostly major
NRI risk score
9
Very Low
Source: FEMA National Risk Index Per-county per-hazard ratings, December 2025 release
How often does each hazard strike Rock 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 Moderate | an average of 5.9 times per year |
| Winter Weather | Relatively Moderate | an average of 18 times per year |
| Drought | Relatively Low | 11 modeled event-days per year |
| Ice Storm | Relatively Low | an average of 1.2 times per year |
| Cold Wave | Relatively Low | an average of 9.7 times per year |
| Tornado | Relatively Low | roughly once every 2 years |
| Heat Wave | Very Low | 4.1 modeled event-days per year |
| Strong Wind | Relatively Low | an average of 4.1 times per year |
| Landslide | Very Low | roughly once every 20 years |
| Riverine Flooding | Very Low | an average of 1.7 times per year |
| Wildfire | Very Low | roughly once every 3,417 years |
| Earthquake | Very Low | roughly once every 2,849 years |
| Lightning | Very Low | an average of 39 times per year |
Source: FEMA National Risk Index Modeled annualized frequency; drought and heat wave use event-days/year, December 2025 release
Disaster Types
Flood 6
Severe Storm 6
Biological 2
Hurricane 1
Drought 1
What Severe Storm declarations mean here
Severe Storm is the most frequent declaration type on Rock County's record, 38% 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 81.3%
of all 16 declarations
Emergency - 3 18.8%
of all 16 declarations
FEMA Declarations Timeline
| Year | Declarations | |
|---|---|---|
| 2024 | 1 | |
| 2022 | 1 | |
| 2020 | 2 | |
| 2019 | 1 | |
| 2018 | 1 | |
| 2014 | 1 | |
| 2013 | 1 | |
| 2011 | 1 | |
| 2005 | 1 | |
| 1997 | 2 | |
| 1993 | 1 | |
| 1976 | 1 | |
| 1969 | 2 | |
Disaster Declarations
How the 16 FEMA declarations break into federal action codes (DR / EM / FM). Same DISTINCT grain as the table below.
Download these 16 declarations as CSV . FEMA source data is public domain; our derived presentation is CC0.
| 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 |
| 4531 | COVID-19 PANDEMIC | DR | Biological | 2020-04-07 |
| 3453 | COVID-19 | EM | Biological | 2020-03-13 |
| 4442 | SEVERE WINTER STORM, STRAIGHT-LINE WINDS, AND FLOODING | DR | Flood | 2019-06-12 |
| 4390 | SEVERE STORMS, TORNADOES, STRAIGHT-LINE WINDS, AND FLOODING | DR | Flood | 2018-09-05 |
| 4182 | SEVERE STORMS, STRAIGHT-LINE WINDS, FLOODING, LANDSLIDES, AND MUDSLIDES | DR | Flood | 2014-07-21 |
| 4113 | SEVERE WINTER STORM | DR | Severe Storm | 2013-05-03 |
| 1941 | SEVERE STORMS AND FLOODING | DR | Severe Storm | 2010-10-13 |
| 3242 | HURRICANE KATRINA EVACUATION | EM | Hurricane | 2005-09-13 |
| 1158 | SEVERE WINTER STORMS | DR | Severe Storm | 1997-01-16 |
| 1151 | SEVERE ICE STORM | DR | Severe Storm | 1997-01-07 |
| 993 | SEVERE STORMS, TORNADOES & FLOODING | DR | Severe Storm | 1993-06-11 |
| 3013 | DROUGHT | EM | Drought | 1976-06-17 |
| 268 | HEAVY RAINS & FLOODING | DR | Flood | 1969-08-05 |
| 255 | FLOODING | DR | Flood | 1969-04-18 |
Storm Events in Minnesota
Statewide NOAA context only. PlainHazard does not currently attribute these state totals to Rock County.
| Storm Type | Events | Fatalities | Injuries | Property Damage |
|---|---|---|---|---|
| Thunderstorm Wind | 4,420 | 13 | 25 | $68.2M |
| Hail | 4,203 | 0 | 0 | $34.5M |
| Extreme Cold/Wind Chill | 1,789 | 7 | 4 | $55.0K |
| Winter Storm | 1,695 | 2 | 17 | $10.0M |
| Heavy Snow | 1,190 | 9 | 14 | $1.0M |
Source: NOAA Storm Events Database State-level aggregated data, 2015-2025
NFIP Flood Insurance Claims
Total Claims
29
Total Paid
$162.1K
Avg Per Claim
$5.6K
Source: FEMA National Flood Insurance Program (NFIP) OpenFEMA Claims Data
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
Riverine Flooding Very Low
Wildfire Very Low
Earthquake Very Low
Lightning 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 Rock County the two measures on this page point the same way: Hail is the county's highest-rated modeled hazard (Relatively Moderate), 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
Rock County's closest FEMA peer: Potter County, SD
Comparisons use published FEMA declaration fields plus the National Risk Index composite for Rock County. Record similarity, not a safety rating.
Closest declaration profiles
Rock County shows 16 FEMA declarations, led by Severe Storm.
Similar Major-disaster share
Rock County: 13 of 16 of its declarations are Major.
Similar modeled NRI score
Rock County: NRI composite 9.4 (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 Rock County - capture-dated entries only.
Compare beyond this state
Nationwide peers by NRI score & FEMA declaration volume
Two PlainHazard-derived comparison paths for Rock County: nearest out-of-state National Risk Index composite and nearest FEMA declaration count (floor ≥5 records). Record similarity only, not a forecast of the next hazard.
Similar NRI composite
Nearest out-of-state counties by FEMA NRI score. This county: 9.4 (Very Low).
Similar declaration volume
Nearest out-of-state counties by FEMA declaration count. This county: 16. NRI peers are excluded so the two link sets stay distinct.
Further reading for this county
Most disaster-prone counties
With 16 FEMA declarations, Rock 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).
Frequently Asked Questions
What is the most common disaster type in Rock County?
The most common disaster type in Rock County is Severe Storm, with 6 declarations. Other disaster types include Flood (6), Biological (2), Hurricane (1).
How does Rock County's FEMA declaration record compare with the Minnesota average?
The typical Minnesota county has 17.7 FEMA declaration records; Rock County has 16, or 10% fewer. Against the national county mean of 20.7, this county's total is 23% lower. The comparison is historical and says nothing about the probability of a future event.
How many major FEMA disaster declarations has Rock County received?
Rock County has received 13 major disaster declarations, representing 81% of all 16 disaster declarations.
How many flood insurance claims has Rock County filed?
Rock County has 29 National Flood Insurance Program (NFIP) claims totaling $162.1K in payments, with an average of $5.6K per claim.
Does FEMA's top risk-rated hazard match the highest Expected Annual Loss in Rock County?
No. In Rock County, Hail has the highest National Risk Index rating (Relatively Moderate), while Riverine Flooding leads Expected Annual Loss at about $2.6M. FEMA's risk score and dollar-loss model use different inputs, so the leaders often differ.
What was the worst year for disasters in Rock County?
The most active year for disaster declarations in Rock County was 1969, with 2 declarations. The county has FEMA disaster data spanning 1969 to 2024.
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?
The top hazard flagged by FEMA's NRI for Rock County is Hail (risk rating: Relatively Moderate). Other significant hazards include Winter Weather (Relatively Moderate) and Drought (Relatively Low). FEMA's modeled event frequency puts hail here at an average of 5.9 times per year, drawn from 223 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.
FEMA OpenFEMA declarations + NRI for Rock County · vintage 2026-08-25 · Methodology · Minnesota profile · Verify with FEMA OpenFEMA · Verify with NOAA Storm Events