Green Lake County, WI
FEMA National Risk Index scores, disaster declarations & hazard data
Green Lake County has experienced 9 federally declared disasters since 1973, most recently Covid-19 in 2020. Its overall natural hazard risk is rated Relatively Low — lower risk than most US counties.
Green Lake County's highest-rated hazards are hail, cold wave, and tornado, with its top risk rated "Relatively Moderate" by FEMA's National Risk Index. Recorded storm events have decreased 42% over the past five years compared to the prior five-year period.
Past disasters & FEMA designations
A federal disaster declaration officially designates a county for FEMA disaster assistance. Green Lake County has been designated in 9 declarations since 1973, covering 5 disaster types including severe storm (3), biological (2), flood (2).
| Year | Type | Event name |
|---|---|---|
| 2020 | Biological | Covid-19 Pandemic |
| 2020 | Biological | Covid-19 |
| 2019 | Flood | Severe Storms, Tornadoes, Straight-Line Winds, Flooding, And Landslides |
| 2008 | Severe Storm | Severe Storms, Tornadoes, And Flooding |
| 2005 | Hurricane | Hurricane Katrina Evacuation |
| 2004 | Severe Storm | Severe Storms And Flooding |
| 1993 | Severe Storm | Severe Storms, Tornadoes & Flooding |
| 1976 | Drought | Drought |
| 1973 | Flood | Severe Storms & Flooding |
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 | 47.1 | 0 | 0 | — |
| Inland Flooding | Relatively Low | 62.3 | 7 | 0 | $23K |
| Coastal Flooding | Not Applicable | — | 0 | 0 | — |
| Earthquake | Very Low | 24 | — | — | — |
| Heat Wave | Relatively Low | 54.9 | 11 | 0 | — |
| Tornado | Relatively Moderate | 75.1 | 2 | 0 | — |
| Hurricane | Very Low | 12.7 | 0 | 0 | — |
| Hail | Relatively Moderate | 93.1 | 11 | 0 | — |
| Strong Wind | Relatively Moderate | 68 | 0 | 0 | — |
| Winter Weather | Relatively Low | 34.4 | 0 | 0 | — |
| Ice Storm | Very Low | 22 | — | — | — |
| Cold Wave | Relatively Moderate | 77.2 | — | — | — |
| Lightning | Relatively Low | 27.8 | 0 | 0 | — |
| Drought | Relatively Low | 43.3 | 0 | 0 | — |
| Landslide | Very Low | 47 | 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
Green Lake County ranks in the 42nd percentile (Low) 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 | 42nd | Low |
| Socioeconomic status | 33rd | Low |
| Household characteristics | 70th | Moderate |
| Racial & ethnic minority status | 24th | Very low |
| Housing type & transportation | 48th | Low |
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 | 32nd | Relatively Low |
| Risk to homes | 31st | Relatively Low |
| Buildings in direct exposure zone | 50.5% | — |
NOAA tracked 30 weather events in this county over 2016–2025: 19 in 2016–20 vs 11 in 2021–25 (-42% — frequency decreasing).
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 Green Lake County?
According to the FEMA National Risk Index, the highest-risk hazards in Green Lake County, Wisconsin are hail, cold wave, and tornado. The county's overall natural hazard risk is rated Relatively Low — lower risk than most US counties.
Has Green Lake County received federal disaster declarations?
Yes. Green Lake County has received 9 federal disaster declarations since 1973, including declarations in 2020. The most common disaster type on record is severe storm (3 declarations).
Has Green Lake County had any FEMA disaster declarations in 2024, 2025, or 2026?
No federal disaster declarations have been recorded for Green Lake County since the start of 2024. Its most recent declaration on record is Covid-19 in 2020.
How does Green Lake County's natural hazard risk compare to nearby counties?
Among neighboring counties, Winnebago County, WI has the highest overall natural hazard risk (Relatively Moderate) and Waushara County, WI has the lowest (Relatively Low). Green Lake County is rated Relatively Low overall.
How is Green Lake County's composite disaster risk index calculated?
Green Lake 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. Green Lake County's composite score of 58 means its overall natural hazard risk is higher than 58% of US counties.