Lyon County, MN
FEMA National Risk Index scores, disaster declarations & hazard data
Lyon County has experienced 18 federally declared disasters since 1969, most recently Severe Storms, Straight-Line Winds, Tornadoes, And Flooding in 2022. Its overall natural hazard risk is rated Relatively Low — lower risk than most US counties.
Lyon County's highest-rated hazards are winter weather, drought, and cold wave, with its top risk rated "Relatively High" by FEMA's National Risk Index. NOAA records 130 storm events in the county over the past decade.
Past disasters & FEMA designations
A federal disaster declaration officially designates a county for FEMA disaster assistance. Lyon County has been designated in 18 declarations since 1969, covering 5 disaster types including severe storm (7), flood (7), biological (2).
| Year | Type | Event name |
|---|---|---|
| 2022 | Severe Storm | Severe Storms, Straight-Line Winds, Tornadoes, And Flooding |
| 2020 | Biological | Covid-19 Pandemic |
| 2020 | Biological | Covid-19 |
| 2019 | Flood | Severe Winter Storm, Straight-Line Winds, And Flooding |
| 2018 | Flood | Severe Storms, Tornadoes, Straight-Line Winds, And Flooding |
| 2014 | Flood | Severe Storms, Straight-Line Winds, Flooding, Landslides, And Mudslides |
| 2011 | Severe Storm | Severe Storms, Flooding, And Tornadoes |
| 2011 | Flood | Severe Storms And Flooding |
| 2011 | Severe Storm | Severe Storms And Flooding |
| 2010 | Flood | Flooding |
Showing the 10 most recent of 18 total declarations since 1969.
Source: FEMA OpenFEMA Disaster Declarations Summaries. A single disaster can produce more than one record per county. Data current through September 2026.
Risk by hazard type
| Hazard | Risk rating | Risk score | Recorded events | Deaths | Prop. damage |
|---|---|---|---|---|---|
| Wildfire | Very Low | 17.3 | 0 | 0 | — |
| Inland Flooding | Relatively Low | 57.2 | 44 | 0 | $1.2M |
| Coastal Flooding | Not Applicable | — | 0 | 0 | — |
| Earthquake | Very Low | 15.7 | — | — | — |
| Heat Wave | Very Low | 34.7 | 17 | 0 | — |
| Tornado | Relatively Low | 41.3 | 2 | 0 | $55K |
| Hurricane | Not Applicable | — | 0 | 0 | — |
| Hail | Relatively Low | 67.5 | 67 | 0 | — |
| Strong Wind | Relatively Low | 34.2 | 0 | 0 | — |
| Winter Weather | Relatively High | 86.9 | 0 | 0 | — |
| Ice Storm | Relatively Low | 53.2 | — | — | — |
| Cold Wave | Relatively Moderate | 72.4 | — | — | — |
| Lightning | Very Low | 4.5 | 0 | 0 | — |
| Drought | Relatively Moderate | 76.4 | 0 | 0 | — |
| Landslide | Very Low | 39.3 | 0 | 0 | — |
| Avalanche | Not Applicable | — | — | — | — |
| Tsunami | Not Applicable | — | — | — | — |
| Volcanic Activity | Not Applicable | — | — | — | — |
Scores are 0–100 percentiles relative to all US counties — higher means more exposed, not that a disaster is likely this year. Event counts: NOAA Storm Events 2016–2026; earthquake counts from USGS ComCat (M3.0+, 1996–2026). See the methodology page for details.
Community vulnerability
Lyon County ranks in the 53rd percentile (Moderate) for community vulnerability — a measure of how hard disaster impacts tend to hit residents. Higher vulnerability means more displacement, worse health outcomes, and slower recovery after a disaster.
| SVI theme | Percentile | Vulnerability level |
|---|---|---|
| Overall | 53rd | Moderate |
| Socioeconomic status | 21st | Very low |
| Household characteristics | 72nd | Moderate |
| Racial & ethnic minority status | 49th | Low |
| Housing type & transportation | 85th | High |
Source: CDC/ATSDR Social Vulnerability Index 2022. Percentiles compare counties nationally — higher means more vulnerable relative to other counties. See CDC SVI for full methodology.
Future risk outlook
| Wildfire metric | National percentile | Level |
|---|---|---|
| Burn probability | 12th | Very Low |
| Risk to homes | 17th | Very Low |
| Buildings in direct exposure zone | 31.5% | — |
NOAA tracked 130 weather events in this county over 2016–2025: 64 in 2016–20 vs 66 in 2021–25 (+3% — relatively stable).
Wildfire: USDA Forest Service Wildfire Risk to Communities (RDS-2020-0016-2) — modeled values, not annual forecasts. See wildfirerisk.org. Inland flood and heat projections pending data availability; coastal sea-level projections are available for select coastal counties below — see the data page.
Nearby counties
Frequently asked questions
What natural hazards pose the greatest risk in Lyon County?
According to the FEMA National Risk Index, the highest-risk hazards in Lyon County, Minnesota are winter weather, drought, and cold wave. The county's overall natural hazard risk is rated Relatively Low — lower risk than most US counties.
Has Lyon County received federal disaster declarations?
Yes. Lyon County has received 18 federal disaster declarations since 1969, including declarations in 2022. The most common disaster type on record is severe storm (7 declarations).
Has Lyon County had any FEMA disaster declarations in 2024, 2025, or 2026?
No federal disaster declarations have been recorded for Lyon County since the start of 2024. Its most recent declaration on record is Severe Storms, Straight-Line Winds, Tornadoes, And Flooding in 2022.
How does Lyon County's natural hazard risk compare to nearby counties?
Among neighboring counties, Redwood County, MN has the highest overall natural hazard risk (Very Low) and Pipestone County, MN has the lowest (Very Low). Lyon County is rated Relatively Low overall.
How is Lyon County's composite disaster risk index calculated?
Lyon County's composite disaster risk index — officially FEMA's National Risk Index (NRI) — scores every US county on a 0–100 percentile scale across 18 natural hazard types, factoring in expected annual loss, social vulnerability, and community resilience. Lyon County's composite score of 44 means its overall natural hazard risk is higher than 44% of US counties.