437 flood insurance claims·$5.2M paid·4 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 Mercer County, West Virginia. 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.
Mercer County experiences a flood risk profile dominated by flash flooding, with 77 flash flood events compared to 36 standard flood events recorded over the last 30 years by the NOAA Storm Events Database. Recent flood events driven by deep moisture flow from low pressure systems and upper-level troughs occurred in January 2025 and February 2025.
National Flood Insurance Program claims data indicates that properties in Zone A have experienced the highest volume of claims with 228 filings, averaging an $17,877 payout and an average recorded water depth of 9 inches. Meanwhile, properties designated as Zone X recorded the highest average payout at $23,175, with an average recorded water depth of 21 inches across claims. Zone X_UNSHADED recorded 67 claims with an average payout of $8,649 and an average water depth of 5 inches, while Zone X_SHADED recorded 29 claims averaging a $13,792 payout with a 6-inch average water depth. Properties in unknown zones accounted for 65 claims with an average payout of $3,893 and a 2-inch average water depth.
Homeowners, real estate agents, and journalists should pay the closest attention to properties located within Zone A and Zone X, as these zones account for the highest claim counts and the largest financial payouts and water depths.
Summary written from NOAA storm reports and NFIP claims for this county. Not a prediction.
30% of Mercer County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.
324 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 8 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 2001, with 82 claims and $704,734 paid, the year of Severe Storms, Flooding and Landslides.
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.
70 NOAA storm reports from Mercer County describe what happened, in the words of the forecasters who covered it. Read the West Virginia flood stories →
27 federal disaster declarations since 1967, 4 of them floods, coastal storms or hurricanes.
| Disaster | Began |
|---|---|
| Severe Winter Storm | Jan 23, 2026 |
| Severe Storm, Straight-line Winds, Flooding, Landslides, And Mudslides | Feb 15, 2025 |
| Post-tropical Storm Helene | Sep 25, 2024 |
| Severe Winter Storm, Flooding, Landslides, And Mudslides | Mar 3, 2015 |
| Hurricane Sandy | Oct 29, 2012 |
| Severe Storms | Jun 29, 2012 |
| Severe Storms And Straight-line Winds | Jun 29, 2012 |
| Severe Storms, Flooding, Mudslides, And Landslides | Mar 12, 2010 |
Weather and water disasters only; most recent first. Source: OpenFEMA Disaster Declarations.
113 since 1996: 77 flash floods and 36 river or area floods.
| Event | Date | Damage |
|---|---|---|
| Flood | Jan 31, 2025 | — |
| Flash Flood | Jul 30, 2025 | — |
| Flood | Feb 15, 2025 | — |
| Flash Flood | Feb 15, 2025 | $50,000 |
| Flood | Feb 15, 2025 | $50,000 |
| Flash Flood | Feb 15, 2025 | $2.0M |
| Flood | Feb 1, 2025 | — |
| Flash Flood | Sep 26, 2024 | $25,000 |
— = no damage estimate in the record. Source: NOAA Storm Events Database.
Flood · Jan 31, 2025. A deep low pressure system moved from the Four-Corners region east across the Gulf Coast states. This resulted in deep moisture flow riding a southwesterly 50-knot low level jet from the Gulf through the central Appalachians and the upper Ohio River Valley beginning early on the morning of the 31st, with precipitable water values rapidly increasing into the 1.1 to 1.2 inch range by sunrise across most of the lower…
Flash Flood · Jul 30, 2025. A slow-moving and localized thunderstorm produced between 3 and 3.5 inches or rain during 90-minutes across the Adair Run basin. Rainfall rates were estimated by radar to be up to 4 inches per hour at times. CREST Unit streamflow was estimated to be as high as 450 cfs per mi^2, while the 3-hour ARI reached as high as a 200-year event by 8:45 pm EDT.
Flood · Feb 15, 2025. A deep upper level trough was observed exiting the southern Rockies during the morning of February 15th, with southwesterly windflow ahead of the trough allowing for a fetch of deep moisture from the western Gulf of America. This moisture pooled along a warm front situated across from Kentucky into southwest Virginia, where precipitable water values increased from 0.6 to 0.7 inches at 7 am that morning, to around…
Flash Flood · Feb 15, 2025. A deep upper level trough was observed exiting the southern Rockies during the morning of February 15th, with southwesterly windflow ahead of the trough allowing for a fetch of deep moisture from the western Gulf of America. This moisture pooled along a warm front situated across from Kentucky into southwest Virginia, where precipitable water values increased from 0.6 to 0.7 inches at 7 am that morning, to around…
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 Mercer 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.