2,200 flood insurance claims·$61.3M 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 Columbia County, Pennsylvania. 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 summer thunderstorms dominates Columbia County, supplemented by river floods and tropical systems. Over the last 30 years, NOAA records show 30 flash flood events, 16 general flood events, and 1 tropical storm. Recent activity includes heavy rainfall rates exceeding two inches per hour from slow-moving thunderstorms in July 2025, and waves of flooding driven by persistent moist southerly air flow in July 2018.
National Flood Insurance Program records indicate that high-risk areas bear the heaviest impact. Zone A properties account for 1,527 claims with an average payout of $34,308 and an average recorded water depth of 16 inches. Moderate-to-low risk zones also experience significant impacts; Zone X_SHADED recorded 284 claims with an average payout of $28,734 and an average water depth of 19 inches, while Zone X recorded 221 claims with an average payout of $26,068 and an average water depth of 15 inches. Zone X_UNSHADED logged 74 claims averaging $30,761 with an average water depth of 12 inches, and Zone UNKNOWN recorded 94 claims averaging $2,147 with an average water depth of 2 inches.
Homeowners, real estate agents, and journalists should pay the most attention to properties in high-risk Zone A, as well as properties located in shaded and unshaded Zone X areas where historical claims demonstrate that significant water depths and financial losses still occur.
Summary written from NOAA storm reports and NFIP claims for this county. Not a prediction.
19% of Columbia County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.
1,885 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 16 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 2011, with 798 claims and $37.8M paid, the year of Remnants Of Tropical Storm Lee and Tropical Storm Lee.
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.
4 NOAA storm reports from Columbia County describe what happened, in the words of the forecasters who covered it. Read the Pennsylvania flood stories →
20 federal disaster declarations since 1972, 8 of them floods, coastal storms or hurricanes.
| Disaster | Began |
|---|---|
| Severe Storms And Flooding | Aug 10, 2018 |
| Hurricane Sandy | Oct 26, 2012 |
| Remnants Of Tropical Storm Lee | Sep 3, 2011 |
| Tropical Storm Lee | Sep 3, 2011 |
| Severe Storms, Flooding, And Mudslides | Jun 23, 2006 |
| Hurricane Katrina | Aug 29, 2005 |
| Severe Storms And Flooding | Apr 2, 2005 |
| Tropical Depression Ivan | Sep 17, 2004 |
Weather and water disasters only; most recent first. Source: OpenFEMA Disaster Declarations.
47 since 1996: 30 flash floods and 16 river or area floods.
| Event | Date | Damage |
|---|---|---|
| Flash Flood | Jul 14, 2025 | — |
| Flood | Jul 14, 2025 | — |
| Flash Flood | Jun 19, 2019 | — |
| Flash Flood | Jul 25, 2018 | — |
| Flash Flood | Aug 13, 2018 | — |
| Flash Flood | Oct 2, 2018 | — |
| Flash Flood | Jul 24, 2017 | — |
| Flash Flood | Sep 2, 2013 | — |
— = no damage estimate in the record. Source: NOAA Storm Events Database.
Flash Flood · Jul 14, 2025. A shortwave trough, moving through an unstable and extremely moist air mass (PWATs over 2.00) over central Pennsylvania, allowed for showers and thunderstorms to develop across the area during the afternoon hours of July 13, 2025. Thunderstorms in this environment began to become strong-to-severe; however, rainfall rates within the thunderstorms were the most notable feature, topping out over two inches per hour.…
Flood · Jul 14, 2025. A shortwave trough, moving through an unstable and extremely moist air mass (PWATs over 2.00) over central Pennsylvania, allowed for showers and thunderstorms to develop across the area during the afternoon hours of July 13, 2025. Thunderstorms in this environment began to become strong-to-severe; however, rainfall rates within the thunderstorms were the most notable feature, topping out over two inches per hour.…
Flash Flood · Jun 19, 2019. Heavy rainfall led to three areas of flash flooding during the evening hours on Wednesday June 19th.
Flash Flood · Jul 25, 2018. I persistent upper level flow of moist southerly air brought waves of flooding and flash flooding to the region. Significant flooding was reported across eastern portions of the area. Two deaths were also reported, one person was washed away attempting to cross a stream, while a motorist was swept away in flood waters.
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 Columbia 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.