8 flood insurance claims·$88,553 paid·5 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 Chester 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 and inland flooding from heavy rainfall and tropical systems dominate the flood character of Chester County. Historical NOAA records show that heavy rain events are driven by slow-moving frontal systems, summer thunderstorms, and tropical cyclones. For example, Tropical Cyclone Helene brought heavy rain and embedded thunderstorms to the region in September 2024, while a slow-moving frontal system produced widespread flash flooding in February 2020.
National Flood Insurance Program records indicate that claims have been filed across multiple zones, with distinct payout averages and recorded water depths. Properties in high-risk Zone A recorded an average water depth of 2 inches with an average payout of $6,435 across 3 claims. Meanwhile, Zone X recorded 3 claims with an average payout of $25,191 and an average recorded water depth of 0 inches, Zone X_UNSHADED recorded 1 claim with an average payout of $22,657 and an average water depth of 1 inch, and Zone UNKNOWN recorded 1 claim with an average payout of $21,401 and an average water depth of 0 inches.
Homeowners, real estate agents, and journalists should pay the closest attention to properties located in designated high-risk Zone A areas, as well as properties in moderate-to-low risk zones where heavy rainfall from tropical systems and severe thunderstorms can still generate significant flood claims.
Summary written from NOAA storm reports and NFIP claims for this county. Not a prediction.
In flood insurance claims here that reported a flood depth, the average was 2 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 2013, with 2 claims and $4,571 paid.
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.
3 NOAA storm reports from Chester County describe what happened, in the words of the forecasters who covered it. Read the South Carolina flood stories →
23 federal disaster declarations since 1977, 5 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 |
| Severe Storms, Tornadoes, Straight-line Winds, And Flooding | Feb 6, 2020 |
| Hurricane Dorian | Aug 31, 2019 |
| Hurricane Florence | Sep 8, 2018 |
Weather and water disasters only; most recent first. Source: OpenFEMA Disaster Declarations.
15 since 1996: 7 flash floods and 6 river or area floods.
| Event | Date | Damage |
|---|---|---|
| Tropical Storm | Sep 27, 2024 | $500,000 |
| Flash Flood | Feb 6, 2020 | $50,000 |
| Tropical Storm | Oct 11, 2018 | — |
| Flash Flood | Jul 11, 2013 | — |
| Flash Flood | Jul 11, 2013 | $50,000 |
| Flood | Sep 8, 2004 | — |
| Flash Flood | Sep 8, 2004 | — |
| Flash Flood | Feb 27, 2003 | — |
— = no damage estimate in the record. Source: NOAA Storm Events Database.
Tropical Storm · Sep 27, 2024. Tropical Cyclone Helene began organizing over the western Caribbean on the 23rd and 24th of September before rapidly intensifying as it moved north through the eastern Gulf of Mexico on the 25th and 26th. A plume of moisture extending from the intensifying storm interacted with a slow-moving cold front to produce a band of widespread heavy rain showers and embedded scattered thunderstorms over the southern Appalac…
Flash Flood · Feb 6, 2020. Unusually high levels of moisture for early February combined with a slow-moving frontal system to produce an extended period of moderate to heavy rainfall across Upstate South Carolina from the morning of the 5th until the early morning hours of the 7th. Intense rain rates associated with bands of heavy rain showers and embedded thunderstorms developing along the front during the morning and afternoon of the 7th…
Tropical Storm · Oct 11, 2018. Tropical cyclone Michael gradually weakened as it tracked from the South Carolina Midlands through portions of the South Carolina and North Carolina Piedmont throughout the 11th. Gusty winds increased to 35 to 45 mph during the daylight hours on the east side of the storm track, with numerous trees blown across the Piedmont.
Flash Flood · Jul 11, 2013. Slow moving thunderstorms dropped very heavy rain over the northeast piedmont of South Carolina, resulting in flash flooding.
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 Chester 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.