5,251 flood insurance claims·$162.8M paid·9 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 Middlesex County, New Jersey. 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 severe summer thunderstorms dominates the flood profile of Middlesex County, New Jersey. According to NOAA Storm Events Database records over the last 30 years, flash floods account for the highest frequency of events with 120 occurrences and 3 deaths, followed by 48 coastal flood events, 34 general flood events resulting in 2 deaths, 8 storm surge or tide events, and 4 tropical storm events.
Recent occurrences illustrate this severe weather pattern. For example, an approaching cold front sparked showers, thunderstorms, and resulting flash flooding on July 14, 2025, while a stationary front produced similar conditions and flash flooding on July 31, 2025.
Federal Emergency Management Agency data indicates that flood risks extend beyond high-risk zones, resulting in significant insurance claims. Properties in Zone A account for 3,745 claims with an average payout of $39,473 and an average recorded water depth of 12 inches. Meanwhile, properties designated as Zone X record 689 claims with an average payout of $34,822 and an average water depth of 10 inches; unshaded Zone X properties record 383 claims averaging $22,783 with an average water depth of 13 inches; and shaded Zone X properties account for 252 claims averaging $34,580 with an average water depth of 14 inches. Properties with unknown zones account for 157 claims averaging $6,050 with an average water depth of 11 inches. Homeowners and real estate professionals in both high-risk coastal or riverine areas and moderate-to-low risk zones should pay close attention to these historical claims and water depths when assessing property vulnerability.
Summary written from NOAA storm reports and NFIP claims for this county. Not a prediction.
14% of Middlesex County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.
4,394 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 2011, with 1,114 claims and $28.8M paid, the year of Hurricane Irene and Severe Storm.
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.
40 NOAA storm reports from Middlesex County describe what happened, in the words of the forecasters who covered it. Read the New Jersey flood stories →
30 federal disaster declarations since 1965, 9 of them floods, coastal storms or hurricanes.
| Disaster | Began |
|---|---|
| Remnants Of Hurricane Ida | Sep 1, 2021 |
| Severe Winter Storm And Snowstorm | Jan 22, 2016 |
| Hurricane Sandy | Oct 26, 2012 |
| Severe Storm | Oct 29, 2011 |
| Hurricane Irene | Aug 27, 2011 |
| Severe Winter Storm And Snowstorm | Dec 26, 2010 |
| Severe Storms And Flooding | Mar 12, 2010 |
| Severe Storms And Inland And Coastal Flooding | Apr 14, 2007 |
Weather and water disasters only; most recent first. Source: OpenFEMA Disaster Declarations.
214 since 1996: 120 flash floods, 34 river or area floods and 56 coastal floods or surges.
| Event | Date | Damage |
|---|---|---|
| Flash Flood | Jul 31, 2025 | — |
| Flash Flood | May 14, 2025 | — |
| Flash Flood | May 14, 2025 | $10,000 |
| Flash Flood | Jul 14, 2025 | — |
| Coastal Flood | Jan 13, 2024 | — |
| Coastal Flood | Mar 9, 2024 | — |
| Flash Flood | Aug 6, 2024 | — |
| Flood | Dec 28, 2023 | — |
— = no damage estimate in the record. Source: NOAA Storm Events Database.
Flash Flood · Jul 31, 2025. A stationary front sparked off showers and thunderstorms across the forecast area. Flash flooding resulted.
Flash Flood · May 14, 2025. Scattered thunderstorms producing heavy rain developed across the area on the afternoon of May 14.
Flash Flood · Jul 14, 2025. An approaching cold front sparked off showers and thunderstorms across the forecast area. Flash flooding resulted.
Coastal Flood · Jan 13, 2024. Strong south to southeast winds resulted in widespread tidal flooding for much of the coast line and tidal waterways. The strong southeast to south winds resulted in a push of water up the Delaware Bay/River and through the back bays of the Atlantic coast. The outcome was the tidal inundation of roads and structures.
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 Middlesex 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.