FEMA flood zones · Indiana

Allen County, Indiana Flood Zone Map

1,673 flood insurance claims·$15.7M paid·3 federal flood & hurricane disasters

10% of Allen County’s area is in FEMA’s high-risk flood zones, and another 1% in shaded X (mostly the 0.2% floodplain and areas behind levees).

Share of the whole county outline, rivers and lakes included; parts FEMA hasn’t mapped count as zero.

Coastal high risk (V, VE)FloodwayHigh risk (A, AE)Moderate (X, 500-year)Minimal (X)Undetermined (D)

Shaded areas are FEMA’s mapped flood hazard zones in and around Allen County, Indiana. 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.

How Allen County floods

Flash flooding from summer thunderstorms dominates Allen County, accounting for over two-thirds of recorded flood events over the last 30 years. NOAA records show that heavy rainfall events frequently impact the region, such as July 2021 when an axis of heavy rain produced 3 to 6 inches of rainfall, causing flash flooding in Fort Wayne along State Road 1 and Interstate 469 while several rivers reached action stage. Another flood event occurred on March 23, 2023, following 1 to 2 inches of initial rainfall combined with midday thunderstorms.

NFIP claim data indicates that properties mapped within Zone A experienced significant vulnerability, averaging 575 claims with an average payout of $21,024 and an average recorded water depth of 8 inches. Properties in Zone X recorded 131 claims with an average payout of $22,102 and an average recorded water depth of 6 inches, while Zone UNKNOWN accounted for the highest claim volume at 938 claims, averaging $5,964 and an average water depth of 2 inches. Zone X_SHADED recorded 20 claims with an average payout of $11,767 and an average water depth of 13 inches, and Zone X_UNSHADED logged 9 claims averaging $17,443 with an average water depth of 2 inches. Homeowners, real estate agents, and journalists should pay the most attention to properties in Zone A and unmapped or unknown zones where historical claims and water depths indicate measurable flood exposure.

Summary written from NOAA storm reports and NFIP claims for this county. Not a prediction.

Where the flood claims came from

5% of Allen County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.

604 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.

How deep the water got

outlet80″ door12″24″36″48″60″72″84″

In flood insurance claims here that reported a flood depth, the average was 4 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.

Flood claims, year by year

The worst year was 1982, with 560 claims and $3.4M paid, the year of Severe Storms & Flooding.

1978: 118 claims1979: 8 claims1980: 6 claims1981: 27 claims1982: 560 claims1983: 10 claims1984: 4 claims1985: 193 claims1986: 5 claims1987: 1 claims1988: 2 claims1989: 18 claims1990: 78 claims1991: 30 claims1992: 19 claims1993: 13 claims1995: 5 claims1996: 4 claims1997: 17 claims1998: 8 claims1999: 9 claims2000: 4 claims2001: 2 claims2002: 77 claims2003: 171 claims2004: 22 claims2005: 32 claims2006: 6 claims2007: 1 claims2008: 23 claims2009: 19 claims2010: 3 claims2011: 23 claims2013: 90 claims2014: 8 claims2015: 25 claims2016: 5 claims2017: 12 claims2018: 2 claims2020: 1 claims2021: 5 claims2022: 3 claims2024: 1 claims2025: 1 claims2026: 2 claims19801990200020102020

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.

In their words

6 NOAA storm reports from Allen County describe what happened, in the words of the forecasters who covered it. Read the Indiana flood stories →

Federal disasters

17 federal disaster declarations since 1978, 3 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Winter StormJan 23, 2026
Severe Storms, Straight-line Winds, And TornadoesMar 31, 2023
Severe Winter Storm And SnowstormJan 5, 2014
Severe Storms, Tornadoes, And FloodingMar 8, 2009
Severe Storms And FloodingJan 7, 2008
SnowFeb 12, 2007
Hurricane Katrina EvacuationAug 29, 2005
Severe Winter Storms And FloodingJan 1, 2005

Weather and water disasters only; most recent first. Source: OpenFEMA Disaster Declarations.

Recorded flood events

39 since 1996: 27 flash floods and 12 river or area floods.

EventDateDamage
FloodApr 2, 2025$1,000
FloodMar 23, 2023$15,000
Flash FloodJul 5, 2022$5,000
Flash FloodJul 16, 2021—
FloodJul 8, 2020—
Flash FloodAug 29, 2017$300,000
Flash FloodMay 24, 2017—
FloodMay 10, 2016—

— = no damage estimate in the record. Source: NOAA Storm Events Database.

From the storm reports

Flood · Apr 2, 2025. The atmosphere was primed for severe weather during the afternoon and evening hours of April 2nd. 0-1 km SRH values of 300 to 500 m2/s2, 60 to 70 kts of shear and MLCAPE of around 1000 J/KG set the stage for numerous thunderstorms. Damage reports were not as widespread, but those that occurred tended to be in swaths related to cold pools from bowing segments or tornadoes. Eight tornadoes (three in northern Indian…

Flood · Mar 23, 2023. By daybreak on March 23, about 1 to 2 inches of rain had fallen over parts of northern Indiana. Additional rain and thunderstorms moved through during the late morning and midday hours. This resulted in flooding at some locations.

Flash Flood · Jul 5, 2022. Thunderstorms developed in the afternoon and evening of July 5. Widespread wind damage occurred in an area from Steuben County through Allen County in Indiana.

Flash Flood · Jul 16, 2021. An axis of heavy rain set up along and south of US 24, with flash flooding reported in Fort Wayne along SR-1 and I 469. Isolated amounts of 3-6 of rain were reported, with reports of 1-3 more widespread. Several rivers went into action stage during the event.

National Weather Service narratives, lightly trimmed. Source: NOAA Storm Events Database.

The zones you’ll see on the map

Every colour on the map above is a place on this drawing: where the ground sits relative to the flood FEMA plans for.

Cross-section of a river floodplainDiagram: a river valley. The floodway is the channel and the land beside it; the 1%-annual-chance flood surface (the base flood elevation) covers the valley floor as zone A or AE; a narrow band higher up is shaded X, the 0.2% floodplain; higher ground is X.0.2% CHANCE A YEAR (500-YEAR)BASE FLOOD ELEVATION · 1% A YEARXAEFloodwayAEX
  1. A / AE Inside the 1%-a-year floodplain: about a 26% chance of flooding over a 30-year mortgage. AE has a mapped base flood elevation; plain A does not.
  2. Floodway The channel and the land beside it that has to be kept clear enough to carry the flood. Building here is tightly limited.
  3. X shaded The 0.2% (500-year) floodplain, plus some levee-protected and very shallow flood areas.
  4. X Outside both lines. No federal requirement to insure, which is not the same as no risk.

Every flood zone code explained →

Flood insurance in Allen County

If a building in Allen 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.