FEMA flood zones · Minnesota

Aitkin County, Minnesota Flood Zone Map

95 flood insurance claims·$754,787 paid·11 federal flood & hurricane disasters

Less than 1% of Aitkin County’s area is in FEMA’s high-risk flood zones.

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 Aitkin County, Minnesota. 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 Aitkin County floods

Flash flooding and river flooding from summer thunderstorms and stationary weather boundaries equally dominate the flood history of Aitkin County, with 16 flood events and 16 flash flood events recorded over the last 30 years. Heavy rainfall events, such as those driven by training storms in June 2018 and a warm front in September 2019, have produced torrential downpours, saturated soils, closed roads, and flash flooding.

National Flood Insurance Program records show claims across multiple zones, indicating risk extends beyond traditional high-risk areas. Zone A accounts for the highest volume with 63 claims, averaging an $13,207 payout with an average recorded water depth of 8 inches. Properties in Zone X have also experienced impacts, recording 13 claims with an average payout of $8,133 and an average water depth of 7 inches, alongside 13 claims in Zone UNKNOWN averaging a $543 payout and 2 inches of average water depth.

Homeowners, real estate agents, and journalists should pay the closest attention to properties located within high-risk Zone A, as well as those in Zone X and unshaded Zone X areas where historical claims and standing water depths indicate potential vulnerability to severe summer rainfall events.

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

Where the flood claims came from

6% of Aitkin County’s flood insurance claims were on properties rated outside FEMA’s high-risk zones.

67 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 7 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 2012, with 56 claims and $661,320 paid, the year of Severe Storms and Flooding.

1979: 12 claims1982: 1 claims1983: 2 claims1997: 2 claims2001: 18 claims2003: 1 claims2012: 56 claims2016: 1 claims2019: 1 claims2023: 1 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

11 NOAA storm reports from Aitkin County describe what happened, in the words of the forecasters who covered it. Read the Minnesota flood stories →

Federal disasters

21 federal disaster declarations since 1965, 11 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Storms And FloodingApr 11, 2023
Severe Storms, Straight-line Winds, Tornadoes, And FloodingMay 29, 2022
Severe Storms, Tornadoes, Straight-line Winds, And FloodingJun 15, 2018
Severe Storms And FloodingJun 14, 2012
Hurricane Katrina EvacuationAug 29, 2005
Severe Winter Storms, Flooding, And TornadoesMar 23, 2001
Severe Storms, Winds, And FloodingJul 4, 1999
Severe Flooding, High Winds,severe StormsMar 21, 1997

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

Recorded flood events

32 since 1996: 16 flash floods and 16 river or area floods.

EventDateDamage
Flash FloodAug 14, 2020—
Flash FloodSep 30, 2019—
Flash FloodJun 30, 2019—
Flash FloodMay 24, 2018—
Flash FloodJun 17, 2018—
Flash FloodJul 12, 2018—
Flash FloodJul 11, 2016—
FloodApr 30, 2013—

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

From the storm reports

Flash Flood · Aug 14, 2020. A strong cold front pushed across Minnesota the evening of the 14th and led to the development of a line of storms ahead of the front. As the storms pushed across northeastern Minnesota, they produced all modes of severe weather. Heavy rainfall led to areas of flash flooding, mainly along the western Iron Range. The bulk of the severe reports consisted of damaging wind gusts that brought down numerous trees, leadi…

Flash Flood · Sep 30, 2019. A warm front set up over the region during the early morning hours of the 30th. Torrential rainfall was reported overnight leading to saturated soils in the area. Additional showers and thunderstorms moved over these same areas during the late morning and early afternoon hours and led to isolated areas of flash flooding where water over the roadway led to closed roads.

Flash Flood · Jun 30, 2019. A complex of thunderstorms formed overnight in northern Minnesota then tracked southeast through the early morning hours along an instability gradient. Large hail and wind damage were observed with this system, but due to it occurring during the early morning hours, most of the damage reports were not received until the next morning. Heavy rainfall also led to some isolated flash flooding as well.

Flash Flood · May 24, 2018. A warm front and a low level jet combined to produce persistent storms the night of the 24th. Radar estimates of 3-5.5 over parts of east-central Minnesota led to isolated flash flooding.

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 Aitkin County

If a building in Aitkin 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.