States › South Carolina › Sumter County › Flood
Flood in Sumter County, South Carolina
34 floods and flash floods events in the NCEI Storm Events record, 1950 to 2026. Event types counted: Flood, Flash Flood, Coastal Flood, Lakeshore Flood.
NCEI notes that Storm Data is compiled from a variety of sources including the National Weather Service, other federal, state and local agencies, the media and the public; that property and crop damage figures are estimates; and that some events are recorded by NWS forecast zone rather than by county. FEMA notes that NFIP claim records are redacted and aggregated to protect the privacy of policyholders. Storm records through 30 Jun 2026.
Sumter County, South Carolina, has 34 flood events in the NCEI record since 1950, with at least one in 11 different years.
September is the busiest month, with 14 of the recorded events. The last 20 years account for 31 events against 3 in the 20 years before, a change that reflects reporting practice as much as weather.
The county holds 1.3% of the 2,557 flood events recorded in South Carolina; its 5.1 per 100 square miles compares with 8.5 statewide.
Compared with South Carolina
| Measure | Sumter County | South Carolina | US |
|---|---|---|---|
| Flood events since 1950 | 34 | 2,557 | 183,559 |
| Per 100 square miles | 5.1 | 8.5 | 5.2 |
| Per 10,000 residents | 3.2 | 4.9 | 5.5 |
| Deaths recorded | 0 | 31 | 2,961 |
| Busiest month | September | August | June |
By year
Seasonality
0Feb
0Mar
4Apr
0May
1Jun
5Jul
0Aug
8Sep
14Oct
2Nov
0Dec
0
Recorded events
All 34 events, most recent first. Magnitude is hail size, tornado rating or wind speed as recorded.
| Date | Event type | Magnitude | Property damage | Crop damage | Deaths | Injuries | Geography |
|---|---|---|---|---|---|---|---|
| 13 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 13 Jun 2025 | Flash Flood | — | $20K | — | — | — | County |
| 13 Jun 2025 | Flash Flood | — | — | — | — | — | County |
| 13 Jun 2025 | Flash Flood | — | $10K | — | — | — | County |
| 12 Aug 2024 | Flash Flood | — | — | — | — | — | County |
| 7 Aug 2024 | Flash Flood | — | — | — | — | — | County |
| 6 Aug 2024 | Flash Flood | — | — | — | — | — | County |
| 6 Aug 2024 | Flash Flood | — | — | — | — | — | County |
| 27 Mar 2023 | Flash Flood | — | $10K | $100 | — | — | County |
| 27 Mar 2023 | Flash Flood | — | $10K | $100 | — | — | County |
| 27 Mar 2023 | Flash Flood | — | $5K | $100 | — | — | County |
| 27 Mar 2023 | Flash Flood | — | $10K | $100 | — | — | County |
| 17 Sep 2020 | Flash Flood | — | $500 | — | — | — | County |
| 17 Sep 2020 | Flash Flood | — | $500 | — | — | — | County |
| 17 Sep 2020 | Flash Flood | — | $500 | — | — | — | County |
| 17 Sep 2020 | Flash Flood | — | $2K | — | — | — | County |
| 29 May 2020 | Flash Flood | — | $100 | $100 | — | — | County |
| 12 Aug 2018 | Flash Flood | — | $100 | $100 | — | — | County |
| 12 Aug 2018 | Flash Flood | — | $100 | $100 | — | — | County |
| 8 Oct 2016 | Flash Flood | — | $10K | — | — | — | County |
| 8 Oct 2016 | Flash Flood | — | $10K | — | — | — | County |
| 2 Sep 2016 | Flash Flood | — | $1K | — | — | — | County |
| 2 Sep 2016 | Flash Flood | — | $2K | — | — | — | County |
| 2 Sep 2016 | Flash Flood | — | $500 | — | — | — | County |
| 2 Sep 2016 | Flash Flood | — | $5K | — | — | — | County |
| 30 Sep 2015 | Flash Flood | — | $4K | — | — | — | County |
| 25 Sep 2015 | Flood | — | $2K | — | — | — | County |
| 25 Sep 2015 | Flood | — | $2K | — | — | — | County |
| 25 Sep 2015 | Flash Flood | — | $2K | — | — | — | County |
| 25 Sep 2015 | Flash Flood | — | $2K | — | — | — | County |
| 25 Sep 2011 | Flash Flood | — | $22K | — | — | — | County |
| 24 Aug 2006 | Flash Flood | — | — | — | — | — | County |
| 29 Aug 2004 | Flash Flood | — | — | — | — | — | County |
| 13 Jun 2001 | Flash Flood | — | — | — | — | — | County |
Questions and answers
How many flood events has Sumter County had?
34 events in the NCEI Storm Events record between 1950 and 2026. Reporting of floods and flash floods became far more complete after 1996, so early decades undercount.
When was the last recorded flood event in Sumter County?
13 Jun 2025 (Flash Flood). Records reach NCEI about 120 days after the month ends.
What was the most damaging flood event recorded in Sumter County?
The flash flood of 25 Sep 2011, with property damage estimated by NCEI at $22K.
How does Sumter County compare with South Carolina for flood?
5.1 events per 100 square miles against 8.5 statewide; the county holds 34 of the state's 2,557 recorded events.
Provenance
NOAA NCEI Storm Events Database, yearly details files through 30 Jun 2026, public domain. County-recorded events plus zone-recorded events whose forecast zone is named for the county (marked "Forecast zone"). Population and area from the US Census Bureau (2021). Built 1 Oct 2026. See the methodology, the Flood hub and the county page.