Sumter County, SC
FEMA National Risk Index scores, disaster declarations & hazard data
Sumter County has experienced 28 federally declared disasters since 1977, most recently Severe Winter Storm in 2026. Its overall natural hazard risk is rated Relatively Moderate — near the middle compared to other US counties.
Sumter County's highest-rated hazards are hurricane, earthquake, and strong wind, with its top risk rated "Relatively Moderate" by FEMA's National Risk Index. Recorded storm events have decreased 25% over the past five years compared to the prior five-year period. Community vulnerability is elevated (88th percentile nationally), suggesting residents may face greater difficulty recovering from major disasters.
Past disasters & FEMA designations
A federal disaster declaration officially designates a county for FEMA disaster assistance. Sumter County has been designated in 28 declarations since 1977, covering 8 disaster types including hurricane (15), severe ice storm (3), biological (2).
| Year | Type | Event name |
|---|---|---|
| 2026 | Winter Storm | Severe Winter Storm |
| 2024 | Tropical Storm | Hurricane Helene |
| 2024 | Tropical Storm | Hurricane Debby |
| 2023 | Hurricane | Hurricane Idalia |
| 2023 | Hurricane | Hurricane Ian |
| 2022 | Hurricane | Hurricane Ian |
| 2020 | Biological | Covid-19 Pandemic |
| 2020 | Biological | Covid-19 |
| 2019 | Hurricane | Hurricane Dorian |
| 2018 | Hurricane | Hurricane Irma |
Showing the 10 most recent of 28 total declarations since 1977.
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 | Relatively Low | 79 | 0 | 0 | — |
| Inland Flooding | Relatively Moderate | 76.3 | 25 | 0 | $97K |
| Coastal Flooding | Not Applicable | — | 0 | 0 | — |
| Earthquake | Relatively Moderate | 91.1 | — | — | — |
| Heat Wave | Relatively Moderate | 80.5 | 1 | 1 | — |
| Tornado | Relatively Moderate | 74.9 | 5 | 0 | $45K |
| Hurricane | Relatively Moderate | 91.9 | 0 | 0 | — |
| Hail | Relatively Moderate | 84.1 | 23 | 0 | $830 |
| Strong Wind | Relatively High | 88.4 | 0 | 0 | — |
| Winter Weather | Relatively Moderate | 61 | 0 | 0 | — |
| Ice Storm | Relatively High | 82.7 | — | — | — |
| Cold Wave | Relatively Moderate | 70.7 | — | — | — |
| Lightning | Relatively Moderate | 79 | 2 | 0 | $20K |
| Drought | Relatively Low | 47.6 | 0 | 0 | — |
| Landslide | Very Low | 40.1 | 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
Sumter County ranks in the 88th percentile (High) 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 | 88th | High |
| Socioeconomic status | 86th | High |
| Household characteristics | 63rd | Moderate |
| Racial & ethnic minority status | 90th | High |
| Housing type & transportation | 86th | 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 | 68th | Relatively High |
| Risk to homes | 68th | Relatively High |
| Buildings in direct exposure zone | 64.7% | — |
NOAA tracked 56 weather events in this county over 2016–2025: 32 in 2016–20 vs 24 in 2021–25 (-25% — 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 Sumter County?
According to the FEMA National Risk Index, the highest-risk hazards in Sumter County, South Carolina are hurricane, earthquake, and strong wind. The county's overall natural hazard risk is rated Relatively Moderate — near the middle compared to other US counties.
Has Sumter County received federal disaster declarations?
Yes. Sumter County has received 28 federal disaster declarations since 1977, including declarations in 2026. The most common disaster type on record is hurricane (15 declarations).
Has Sumter County had any FEMA disaster declarations in 2024, 2025, or 2026?
Yes. Recent federal disaster declarations for Sumter County include Severe Winter Storm (2026), Hurricane Helene (2024), Hurricane Debby (2024). See the declarations table above for the full history since 1977.
How does Sumter County's natural hazard risk compare to nearby counties?
Among neighboring counties, Richland County, SC has the highest overall natural hazard risk (Relatively Moderate) and Calhoun County, SC has the lowest (Very Low). Sumter County is rated Relatively Moderate overall.
How is Sumter County's composite disaster risk index calculated?
Sumter 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. Sumter County's composite score of 82 means its overall natural hazard risk is higher than 82% of US counties.