FEMA Records
16
Below median
Iowa · FEMA + NOAA + National Risk Index
Lyon County, IA
16 FEMA disaster declarations (1965-2024), with a FEMA National Risk Index rating of Very Low. Most common hazard: Flood.
- 16
- FEMA declarations
- 13
- Major disasters
- 19
- NRI risk · Very Low
- Flood
- Top hazard
The verdict
Lyon 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 17% below the Iowa county mean. FEMA's separate National Risk Index places the county safer than 19%; that score models loss and vulnerability rather than counting declarations.
- Safer than 19%
- 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
- 75
- 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 19119 · Lyon County 16 declarations · rank 2361/3,266
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 #2,361
- PHOTO-FINISH Greene
- NRI-LOW Very Low
- ACT-HIGH High
- TYPE-LEAD Flood
- VS-ST-BELOW -17%
Nearest declaration peer: Greene, GA (0 declaration gap)
FEMA Disaster Declarations Summaries v2 filing stamps for this county register. Read with this county → · Iowa state profile
Lyon County among counties with fewer federal records
FEMA declaration records among Lyon 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
- Lyon · this county 16
Lyon · this county
16 declarations
- Terrell · near 16
Terrell · near
16 declarations
- Ujelang · smallest 1
Ujelang · smallest
1 declarations
What this shows Lyon County carries 16 FEMA declaration records, ranked 2361 of 3,266 counties in this registry.
Lyon County versus quieter counties in this dataset
Lyon County among lower-declaration counties nationally
FEMA disaster declarations, all-time · Lyon 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
Lyon County's FEMA Risk Index score
Which hazard drives modeled loss here?
FEMA's modeled annual dollar loss for Lyon County is led by Riverine Flooding (about $3.7M Expected Annual Loss, Historical Loss Ratio Relatively High), 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 Lyon County's hazard record show?
Reading the federal records together
The NFIP claims register shows a middle-volume loss record here: 75 paid claims, totaling $1.7M. PlainHazard uses 50-499 claims for this descriptive band; FEMA does not publish it as a safety or coverage category. The $22.4K average describes payments on recorded claims only, leaving uninsured damage and properties without a claim outside the measure.
Start with the state benchmark: a Iowa county averages 19.3 federal declaration records, while Lyon County has 16. The gap is 17% 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.
FEMA National Risk Index
This county's FEMA National Risk Index composite lands at 19.2/100 (Very Low), a modest reading against the rest of the country. Expected Annual Loss is rated Very Low (roughly $10.9M in annualized losses), tempered or compounded by a Very Low social-vulnerability score and Relatively High community-resilience score. 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 6.1 times per year here, based on 233 historical events on record.
55 /100
Historical Activity Index
High historical activity
Lyon County, IA · 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
10/25
16 declarations (0.8x state county average of 19)
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 Lyon County
FEMA NRI 8-hazard radar - Lyon 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
19
Very Low
Source: FEMA National Risk Index Per-county per-hazard ratings, December 2025 release
How often does each hazard strike Lyon 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 6.1 times per year |
| Drought | Relatively Moderate | 20 modeled event-days per year |
| Winter Weather | Relatively Moderate | an average of 18 times per year |
| Ice Storm | Relatively Moderate | an average of 1.2 times per year |
| Tornado | Relatively Low | roughly once every 2 years |
| Cold Wave | Relatively Low | an average of 8.6 times per year |
| Landslide | Very Low | roughly once every 15 years |
| Heat Wave | Very Low | 5.1 modeled event-days per year |
| Wildfire | Very Low | roughly once every 1,933 years |
| Riverine Flooding | Very Low | an average of 2.4 times per year |
| Strong Wind | Relatively Low | an average of 4.2 times per year |
| Lightning | Very Low | an average of 39 times per year |
| Earthquake | Very Low | roughly once every 2,762 years |
Source: FEMA National Risk Index Modeled annualized frequency; drought and heat wave use event-days/year, December 2025 release
Disaster Types
Severe Storm 6
Flood 6
Biological 2
Hurricane 1
Drought 1
What Flood declarations mean here
Flood is the most frequent declaration type on Lyon County's record, 38% 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 - 13 81.3%
of all 16 declarations
Emergency - 3 18.8%
of all 16 declarations
FEMA Declarations Timeline
| Year | Declarations | |
|---|---|---|
| 2024 | 1 | |
| 2020 | 2 | |
| 2019 | 1 | |
| 2018 | 1 | |
| 2014 | 1 | |
| 2013 | 2 | |
| 2010 | 1 | |
| 2008 | 1 | |
| 2005 | 1 | |
| 1993 | 1 | |
| 1977 | 1 | |
| 1969 | 2 | |
| 1965 | 1 | |
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 |
|---|---|---|---|---|
| 4796 | SEVERE STORMS, FLOODING, STRAIGHT-LINE WINDS, AND TORNADOES | DR | Severe Storm | 2024-06-24 |
| 4483 | COVID-19 PANDEMIC | DR | Biological | 2020-03-23 |
| 3480 | COVID-19 | EM | Biological | 2020-03-13 |
| 4421 | SEVERE STORMS AND FLOODING | DR | Flood | 2019-03-23 |
| 4386 | SEVERE STORMS, TORNADOES, STRAIGHT-LINE WINDS, AND FLOODING | DR | Severe Storm | 2018-08-20 |
| 4184 | SEVERE STORMS, TORNADOES, STRAIGHT-LINE WINDS, AND FLOODING | DR | Flood | 2014-07-24 |
| 4126 | SEVERE STORMS, TORNADOES, AND FLOODING | DR | Severe Storm | 2013-07-02 |
| 4114 | SEVERE WINTER STORM | DR | Severe Storm | 2013-05-06 |
| 1930 | SEVERE STORMS, FLOODING, AND TORNADOES | DR | Severe Storm | 2010-07-29 |
| 1763 | SEVERE STORMS, TORNADOES, AND FLOODING | DR | Severe Storm | 2008-05-27 |
| 3239 | HURRICANE KATRINA EVACUATION | EM | Hurricane | 2005-09-10 |
| 996 | SEVERE STORMS & FLOODING | DR | Flood | 1993-07-09 |
| 3036 | DROUGHT | EM | Drought | 1977-03-31 |
| 269 | HEAVY RAINS & FLOODING | DR | Flood | 1969-08-14 |
| 259 | FLOODING | DR | Flood | 1969-04-25 |
| 193 | FLOODING | DR | Flood | 1965-04-22 |
Storm Events in Iowa
Statewide NOAA context only. PlainHazard does not currently attribute these state totals to Lyon County.
| Storm Type | Events | Fatalities | Injuries | Property Damage |
|---|---|---|---|---|
| Thunderstorm Wind | 4,928 | 6 | 227 | $40.5M |
| Hail | 3,736 | 0 | 0 | $4.3M |
| Heavy Rain | 2,394 | 0 | 0 | $292.0K |
| Drought | 1,556 | 0 | 0 | $0 |
| Winter Storm | 1,543 | 3 | 4 | $2.8M |
Source: NOAA Storm Events Database State-level aggregated data, 2015-2025
NFIP Flood Insurance Claims
Total Claims
75
Total Paid
$1.7M
Avg Per Claim
$22.4K
Source: FEMA National Flood Insurance Program (NFIP) OpenFEMA Claims Data
FEMA National Risk Index
Overall Risk
Very Low
Score: 19.2/100
Expected Annual Loss
Very Low
$10.9M/year
Social Vulnerability
Very Low
Community Resilience
Relatively High
Hazard Risk Breakdown
Hail Relatively Moderate
Drought Relatively Moderate
Winter Weather Relatively Moderate
Ice Storm Relatively Moderate
Tornado Relatively Low
Cold Wave Relatively Low
Landslide Very Low
Heat Wave Very Low
Wildfire Very Low
Riverine Flooding Very Low
Strong Wind Relatively Low
Lightning Very Low
Earthquake 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.
Worth noting for Lyon County: the model and the federal record do NOT point at the same hazard. Hail 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
Lyon County's closest FEMA peer: Pope County, MN
Comparisons use published FEMA declaration fields plus the National Risk Index composite for Lyon County. Record similarity, not a safety rating.
Closest declaration profiles
Lyon County shows 16 FEMA declarations, led by Flood.
Similar Major-disaster share
Lyon County: 13 of 16 of its declarations are Major.
Similar modeled NRI score
Lyon County: NRI composite 19.2 (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 Lyon County - capture-dated entries only.
Compare beyond this state
Nationwide peers by NRI score & FEMA declaration volume
Two PlainHazard-derived comparison paths for Lyon 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: 19.2 (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
Understanding disaster data
Lyon County's NFIP claims file (75 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).
Frequently Asked Questions
What is the most common disaster type in Lyon County?
The most common disaster type in Lyon County is Flood, with 6 declarations. Other disaster types include Severe Storm (6), Biological (2), Hurricane (1).
How does Lyon County's FEMA declaration record compare with the Iowa average?
The typical Iowa county has 19.3 FEMA declaration records; Lyon County has 16, or 17% 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 Lyon County received?
Lyon County has received 13 major disaster declarations, representing 81% of all 16 disaster declarations.
How many flood insurance claims has Lyon County filed?
Lyon County has 75 National Flood Insurance Program (NFIP) claims totaling $1.7M in payments, with an average of $22.4K per claim.
Does FEMA's top risk-rated hazard match the highest Expected Annual Loss in Lyon County?
No. In Lyon County, Hail has the highest National Risk Index rating (Relatively Moderate), while Riverine Flooding leads Expected Annual Loss at about $3.7M. FEMA's risk score and dollar-loss model use different inputs, so the leaders often differ.
What was the worst year for disasters in Lyon County?
The most active year for disaster declarations in Lyon County was 1969, with 2 declarations. The county has FEMA disaster data spanning 1965 to 2024.
What is the FEMA National Risk Index score for Lyon County?
According to the FEMA National Risk Index, Lyon County, Iowa has an overall risk score of 19.2 out of 100 (Very Low). Social vulnerability here rates Very Low, while community resilience comes in at Relatively High. The Expected Annual Loss (EAL) score is Very Low, representing $10.9M in annualized losses.
Which natural hazard poses the greatest risk to Lyon County?
FEMA's NRI data points to Lyon County as of the latest release is Hail (risk rating: Relatively Moderate). Other significant hazards include Drought (Relatively Moderate) and Winter Weather (Relatively Moderate). FEMA's modeled event frequency puts hail here at an average of 6.1 times per year, drawn from 233 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 Lyon County · vintage 2026-08-25 · Methodology · Iowa profile · Verify with FEMA OpenFEMA · Verify with NOAA Storm Events