Natural Disasters in Sussex, WI
Hazard risk, disaster history, and FEMA data
Natural Hazard Risk
Source: FEMA National Risk IndexRisk Score
88.9
Relatively Moderate
Expected Annual Loss
93.6
Score (0-100)
Social Vulnerability
10.6
Score (0-100)
Community Resilience
97.4
Score (0-100)
Top Hazard Risks
| Hazard | Risk Score |
|---|---|
| Cold Wave | 97.4 |
| Hail | 96.1 |
| Tornado | 95.7 |
| Heat Wave | 90.4 |
| Winter Weather | 86.5 |
| Ice Storm | 81.7 |
| Landslide | 62.5 |
| Lightning | 60.2 |
| Earthquake | 57.4 |
| Strong Wind | 56.1 |
| Wildfire | 49.7 |
| Drought | 31.6 |
| Hurricane | 9.7 |
Scores range from 0 (lowest risk) to 100 (highest risk) relative to all U.S. communities. Data from FEMA National Risk Index.
Disaster Declarations
Source: FEMA OpenFEMATotal Declarations
18
Most Recent
Flood
Sep 2025
Most Common Type
Flood
6 declarations
| Date | Type | Declaration |
|---|---|---|
| Sep 11, 2025 | Flood | SEVERE STORMS, STRAIGHT-LINE WINDS, FLOODING, AND MUDSLIDES |
| Apr 4, 2020 | Biological | COVID-19 PANDEMIC |
| Mar 13, 2020 | Biological | COVID-19 |
| Jun 14, 2008 | Severe Storm | SEVERE STORMS, TORNADOES, AND FLOODING |
| Mar 19, 2008 | Snowstorm | RECORD SNOW AND NEAR RECORD SNOW |
| Sep 13, 2005 | Hurricane | HURRICANE KATRINA EVACUATION |
| Jun 18, 2004 | Severe Storm | SEVERE STORMS AND FLOODING |
| Jan 24, 2001 | Snowstorm | SNOW |
| Jun 24, 2000 | Severe Storm | SEVERE STORMS, TORNADOES, AND FLOODING |
| Aug 12, 1998 | Severe Storm | SEVERE STORMS AND FLOODING |
| Jul 7, 1997 | Severe Storm | SEVERE STORMS AND FLOODING |
| Aug 6, 1991 | Severe Storm | SEVERE STORMS & HAIL |
| Oct 7, 1986 | Flood | SEVERE STORMS & FLOODING |
| Aug 14, 1986 | Flood | SEVERE STORMS |
| Jun 17, 1976 | Drought | DROUGHT |
| Mar 23, 1976 | Flood | SEVERE STORMS, ICING, WIND & FLOODING |
| Apr 27, 1973 | Flood | SEVERE STORMS & FLOODING |
| Jul 11, 1969 | Flood | SEVERE STORMS & FLOODING |
Flood Insurance (NFIP)
Source: FEMA NFIPTotal Claims
455
Total Claims Paid
$8,587,245
Avg Claim Payout
$18,873
County-level NFIP data from FEMA National Flood Insurance Program.
Disaster Recovery Spending
Source: FEMA Public AssistanceTotal Federal Spending
$6,760,583
Disasters with PA
4
Total Projects
281
| Disaster | Type | Projects | Federal $ |
|---|---|---|---|
| DR-4520 | Biological | 14 | $2,646,963 |
| DR-1768 | Severe Storm(s) | 150 | $2,498,413 |
| DR-3285 | Snow | 67 | $1,053,454 |
| DR-3163 | Snow | 50 | $561,754 |
Hazard Mitigation
Source: FEMA Hazard Mitigation AssistanceMitigation Projects
19
Federal Funding
$4,260,525
Properties Protected
24
Avg Benefit-Cost Ratio
4.12
BCR
Top Mitigation Project Types
| Project Type | Projects | Federal $ |
|---|---|---|
| 200.1: Acquisition of Private Real Property (Structures and Land) - Riverine | 11 | $3,945,275 |
| 91.1: Local Multihazard Mitigation Plan | 4 | $139,390 |
| 91.4: Local Multijurisdictional Multihazard Mitigation Plan - NEW | 1 | $125,355 |
| 91.5: Local Multijurisdictional Multihazard Mitigation Plan - UPDATE | 1 | $41,280 |
| 90.4: Mitigation Plan - Local Multihazard Mitigation Plan | 1 | $9,225 |
Federally funded projects to reduce future disaster risk. Only includes completed or obligated projects.
Sussex has a relatively moderate overall natural hazard risk rating according to FEMA's National Risk Index. The top hazard risks are cold wave, hail, tornado. The area has had 18 federal disaster declarations. The most common disaster type is flood (6 declarations). 455 flood insurance claims have been filed in the area. FEMA has obligated $6,760,583 in public assistance recovery funding. 19 hazard mitigation projects have been funded to reduce future risk.