FEMA flood zones · Kansas

Linn County, Kansas Flood Zone Map

1 flood insurance claims·$9,184 paid·1 federal flood & hurricane disasters

16% of Linn 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 Linn County, Kansas. 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 Linn County floods

Flood risk in Linn County is characterized primarily by riverine floods and summer flash flooding, supported by 36 standard flood events and 18 flash flood events recorded over the last 30 years in the NOAA Storm Events Database.

Historical records illustrate these recurring weather patterns. In April 2019, following a relatively wet month, another round of thunderstorms moved into the region, causing flooding on area roads. Earlier, in July 2017, training thunderstorms dropped 5 to 7 inches of rain over a roughly 3-hour period, resulting in extreme flash flooding along local creeks.

National Flood Insurance Program records show limited claims history, with a single recorded claim in Zone X resulting in an average payout of $9,184 and an average recorded water depth of 0 inches. Property owners located near low-lying areas, creeks, and roadways prone to inundation during heavy rainfall should pay the closest attention to local flood risks.

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

In their words

1 NOAA storm reports from Linn County describe what happened, in the words of the forecasters who covered it. Read the Kansas flood stories →

Federal disasters

19 federal disaster declarations since 1967, 1 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Storms, Straight-line Winds, Tornadoes, And FloodingApr 25, 2024
Tornadoes And FloodingMay 9, 2019
Severe Storms, Straight-line Winds, Tornadoes, Flooding,landslides,and MudslidesApr 28, 2019
Severe Storms, Straight-line Winds, Tornadoes, And FloodingJul 22, 2013
Severe Winter Storms And SnowstormDec 22, 2009
Severe Storms And FloodingJul 8, 2009
Severe Storms, Flooding, Straight-line Winds, And TornadoesApr 25, 2009
Severe Storms, Flooding And TornadoesMay 22, 2008

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

Recorded flood events

54 since 1996: 18 flash floods and 36 river or area floods.

EventDateDamage
FloodApr 30, 2019—
Flash FloodJul 27, 2017—
Flash FloodJul 2, 2015—
Flash FloodMay 31, 2013—
Flash FloodAug 9, 2013—
Flash FloodJun 1, 2011—
FloodMar 18, 2008—
FloodJun 2, 2008—

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

From the storm reports

Flood · Apr 30, 2019. After a relatively wet month, another round of thunderstorms moved into the region, causing some flooding on area roads.

Flash Flood · Jul 27, 2017. On the evening of July 26, a line of thunderstorms formed roughly along the Interstate 70 corridor. The orientation of these storms were such that they trained over Kansas City and surrounding areas for several hours, causing some extreme flash flooding. Some of the heaviest rain hit some of the most vulnerable parts of the city, namely Indian Creek near the Kansas and Missouri state line. in this location between…

Flash Flood · Jul 2, 2015. Thunderstorms initially developed on the Missouri side of the Kansas City Metropolitan area. As the whole area of storms shifted south during the evening hours, storms became severe in east central Kansas producing damaging winds and flash flooding in Linn County.

Flash Flood · May 31, 2013. A weak boundary, combined with a warm and humid airmass, led to a severe thunderstorm, that produced damaging winds and flash flooding, across Linn County, during the late afternoon hours of May 31, 2013.

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 Linn County

If a building in Linn 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.