1,360 flood insurance claims·$60.0M paid·8 federal flood & hurricane disasters
Share of the whole county outline, rivers and lakes included; parts FEMA hasn’t mapped count as zero.
Shaded areas are FEMA’s mapped flood hazard zones in and around Richland County, South Carolina. Zoomed out they are simplified; at street level the map switches to FEMA’s exact layer. Tap anywhere to check that spot, or search an address above.
Flash flooding from slow-moving summer thunderstorms dominates the flood risk in Richland County, South Carolina. Over the last 30 years, NOAA records show that flash floods account for 238 events and 9 deaths, far outpacing standard floods, tropical storms, and tropical depressions. Severe conditions are driven by moist, unstable air masses with high precipitable water values. For example, slow-moving storms trained across Richland County in June 2025, producing heavy rainfall and flash flooding.
NFIP claim data indicates that financial impacts extend across multiple flood zones, with the highest severity concentrated in designated high-risk areas. Properties in Zone A experienced 849 claims with an average payout of $73,990 and an average recorded water depth of 15 inches. Meanwhile, properties in Zone X recorded 413 claims with an average payout of $34,093 and an average water depth of 11 inches. Unshaded Zone X properties recorded 39 claims averaging $17,665 with an average water depth of 3 inches, and Zone V recorded 15 claims averaging $12,318 with an average water depth of 2 inches.
Homeowners, real estate agents, and journalists should pay the closest attention to properties located within Zone A, which face the highest frequency and severity of flood losses, as well as properties in Zone X where moderate flood claims remain common.
Summary written from NOAA storm reports and NFIP claims for this county. Not a prediction.
6% of Richland County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.
916 NFIP claims with a recorded rated flood zone, 1978 to date. The zone is the one FEMA used to rate that policy, which may not match today’s map. Source: OpenFEMA NFIP claims.
In flood insurance claims here that reported a flood depth, the average was 14 inches.
Drawn to scale against an 80-inch door. Even a few inches soaks flooring, the bottom of the drywall and anything plugged in near the floor.
Average of the depths reported on claims (zero and implausible values left out); FEMA’s record doesn’t say exactly where each depth was measured. Source: OpenFEMA NFIP claims.
The worst year was 2015, with 826 claims and $55.6M paid, the year of Severe Storms and Flooding.
Bar height is scaled by square root so ordinary years stay visible next to the worst one. NFIP claims by year of loss. Source: OpenFEMA.
90 NOAA storm reports from Richland County describe what happened, in the words of the forecasters who covered it. Read the South Carolina flood stories →
26 federal disaster declarations since 1977, 8 of them floods, coastal storms or hurricanes.
| Disaster | Began |
|---|---|
| Severe Winter Storm | Jan 21, 2026 |
| Hurricane Helene | Sep 25, 2024 |
| Hurricane Debby | Aug 4, 2024 |
| Hurricane Idalia | Aug 29, 2023 |
| Hurricane Ian | Sep 25, 2022 |
| Hurricane Dorian | Aug 31, 2019 |
| Hurricane Florence | Sep 8, 2018 |
| Hurricane Irma | Sep 6, 2017 |
Weather and water disasters only; most recent first. Source: OpenFEMA Disaster Declarations.
276 since 1996: 238 flash floods and 19 river or area floods.
| Event | Date | Damage |
|---|---|---|
| Flood | May 29, 2025 | — |
| Flash Flood | Sep 20, 2025 | — |
| Flash Flood | Aug 15, 2025 | $5,000 |
| Flash Flood | Jun 13, 2025 | — |
| Flash Flood | Jun 13, 2025 | $2,000 |
| Flash Flood | Jun 13, 2025 | $5,000 |
| Flash Flood | Aug 1, 2025 | $5,000 |
| Flash Flood | Jul 31, 2024 | — |
— = no damage estimate in the record. Source: NOAA Storm Events Database.
Flood · May 29, 2025. Slow moving thunderstorms developed across central SC during the afternoon and evening hours of May 29th. High instability and deep moisture helped produce a environment favorable for damaging winds, hail, and flash flooding. Numerous reports of damaging winds and isolated large hail were confirmed across the Midlands of SC.
Flash Flood · Sep 20, 2025. Widespread pulse thunderstorms produced locally heavy rain across the Midlands, including isolated flash flooding in the Columbia metro in the evening of September 20th. Above average precipitable water, a weak approaching trough, and little wind shear produced slow moving storms with highly efficient rain rates of 3-4 inches per hour.
Flash Flood · Aug 15, 2025. Upper ridging in place to the west of the area, over the central US. A MCS developed east of the ridge axis and moved through the Deep South. Deep layer moisture in place and convergence from colliding outflow boundaries led to heavy rain. This caused urban flash flooding during the night of August 15th into the 16th.
Flash Flood · Jun 13, 2025. Diurnally driven convection developed within a moist and unstable air mass characterized by CAPE values greater than 2000 J/kg with weak wind shear and precipitable water values over 2 inches and dewpoints in the lower 70s. Storms were slow moving and trained across Richland and Sumter counties resulting in flash flooding. Isolated strong storms produced severe wind damage northwest of Sumter.
National Weather Service narratives, lightly trimmed. Source: NOAA Storm Events Database.
Every colour on the map above is a place on this drawing: where the ground sits relative to the flood FEMA plans for.
If a building in Richland County is in a high-risk zone (A or V) and its mortgage comes from a federally regulated or insured lender, or is federally backed, flood insurance is required.
Outside those zones it is optional, and often worth having: from 2014 to 2024 nearly one-third of NFIP claims came from outside the high-risk Special Flood Hazard Area. Since Risk Rating 2.0, NFIP premiums are set for each building, so the only reliable price is a quote: FloodSmart.gov or a local agent.