353 flood insurance claims·$3.9M paid·7 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 Harford County, Maryland. 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 the flood risk in Harford County, Maryland, accounting for the majority of the 231 total recorded flood events over the last 30 years, which include 146 flash floods resulting in 2 deaths, 79 general floods, 4 coastal floods, 1 tropical storm, and 1 storm surge or tide event. Recent events illustrate this pattern, such as the July 2025 flash floods driven by a slow-moving cold front, a highly unstable atmosphere, and tropical moisture that produced training thunderstorms with average rainfall totals of two to four inches and localized amounts up to six inches.
National Flood Insurance Program claims data indicates that risk varies significantly by zone. Properties in coastal Zone V experienced the highest severity, averaging 24 inches of recorded water depth with an average payout of $58,268 across 16 claims. Zone A properties averaged 18 inches of recorded water depth with an average payout of $22,154 across 177 claims. Meanwhile, Zone X properties recorded 90 claims averaging 6 inches of water depth and $13,309 in payouts, and unshaded Zone X properties averaged 1 inch of water depth with a $10,729 average payout across 13 claims.
Residents in coastal Zone V and high-risk riverine Zone A should pay the most attention to flood risk, given their significantly higher average water depths and claim payouts compared to moderate- and low-risk Zone X properties.
Summary written from NOAA storm reports and NFIP claims for this county. Not a prediction.
11% of Harford County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.
217 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 12 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 2003, with 102 claims and $2.0M paid, the year of Snow and Hurricane Isabel.
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.
62 NOAA storm reports from Harford County describe what happened, in the words of the forecasters who covered it. Read the Maryland flood stories →
20 federal disaster declarations since 1971, 7 of them floods, coastal storms or hurricanes.
| Disaster | Began |
|---|---|
| Severe Winter Storm | Jan 23, 2026 |
| Severe Winter Storm And Snowstorm | Jan 22, 2016 |
| Hurricane Sandy | Oct 26, 2012 |
| Remnants Of Tropical Storm Lee | Sep 6, 2011 |
| Hurricane Irene | Aug 26, 2011 |
| Severe Winter Storms And Snowstorms | Feb 5, 2010 |
| Severe Winter Storm And Snowstorm | Dec 18, 2009 |
| Hurricane Katrina Evacuation | Aug 29, 2005 |
Weather and water disasters only; most recent first. Source: OpenFEMA Disaster Declarations.
231 since 1996: 146 flash floods, 79 river or area floods and 5 coastal floods or surges.
| Event | Date | Damage |
|---|---|---|
| Flash Flood | Jul 31, 2025 | — |
| Flash Flood | Jun 30, 2025 | — |
| Flash Flood | Jul 16, 2025 | — |
| Flash Flood | Aug 13, 2025 | — |
| Flash Flood | Jul 8, 2025 | — |
| Flood | Jan 9, 2024 | — |
| Coastal Flood | Jan 9, 2024 | — |
| Coastal Flood | Aug 9, 2024 | — |
— = no damage estimate in the record. Source: NOAA Storm Events Database.
Flash Flood · Jul 31, 2025. A slow moving cold front combined with a highly unstable atmosphere along with tropical moisture to produce slow moving thunderstorms with heavy rainfall. Some of these storms trained over the same areas, resulting in scattered to numerous instances of flash flooding. Total rainfall amounts in areas with flash flooding averaged two to four inches, though some localized amounts up to six inches were observed.
Flash Flood · Jun 30, 2025. A boundary stalled across northeast Maryland and interacted with the Chesapeake Bay breeze to result in a nearly stationary thunderstorm across Baltimore and Harford counties for much of the late afternoon and evening. Localized rainfall amounts of two to six inches were observed, with instances of flash flooding.
Flash Flood · Jul 16, 2025. An anomalously moist airmass with tropical moisture resided over much of Maryland on July 16th. This comes after several days of showers and thunderstorms, which left some areas with suppressed flash flood guidance. Slow moving thunderstorms developed on remnant boundaries and terrain circulations before propagating eastward. These storms produced localized rainfall amounts of two to five inches.
Flash Flood · Aug 13, 2025. Slow moving thunderstorms along a frontal boundary resulted in a localized two to four inches of rain. This resulted in instances of 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 Harford 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.