FEMA flood zones · Nebraska

Clay County, Nebraska Flood Zone Map

1 flood insurance claims·$1,561 paid·4 federal flood & hurricane disasters

11% of Clay County’s area is in FEMA’s high-risk flood zones, and another 2% 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 Clay County, Nebraska. 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.

In their words

13 NOAA storm reports from Clay County describe what happened, in the words of the forecasters who covered it. Read the Nebraska flood stories →

Federal disasters

19 federal disaster declarations since 1967, 4 of them floods, coastal storms or hurricanes.

DisasterBegan
Severe Winter Storm And Straight-line WindsMar 18, 2025
Severe Storms, Straight-line Winds, Tornadoes, And FloodingJun 19, 2024
Severe Storms And Straight-line WindsJul 9, 2021
Severe Winter Storm, Straight-line Winds, And FloodingMar 9, 2019
Severe Winter Storm And Straight-line WindsApr 13, 2018
Severe Storms, Tornadoes, Straight-line Winds, And FloodingMay 6, 2015
Severe Storms, Tornadoes, Straight-line Winds, And FloodingMay 11, 2014
Severe Winter Storms And SnowstormDec 22, 2009

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

Recorded flood events

13 since 1996: 8 flash floods and 5 river or area floods.

EventDateDamage
Flash FloodAug 16, 2020—
FloodMay 27, 2019$50,000
Flash FloodSep 2, 2018$10,000
FloodJun 4, 2015$250,000
Flash FloodJun 14, 2012$8,000
Flash FloodMay 3, 2012$25,000
FloodMay 19, 2011$15,000
FloodAug 26, 2009$30,000

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

From the storm reports

Flash Flood · Aug 16, 2020. On this late Sunday afternoon and evening, several scattered, strong to severe storms advanced southward across various portions of South Central Nebraska, prompting many accounts of large hail and a few damaging wind gusts. While most hail was in the quarter to golf ball size range, larger stones of 2-3 diameter fell in the Chapman and Marquette areas of Merrick/Hamilton counties. Ping pong to golf ball size hail…

Flood · May 27, 2019. Widespread flooding of low-lying areas, fields, creeks, and rivers continued. A large area of heavy rain fell due to multiple thunderstorm episodes on the nights of the 26th and 27th, and resulted in 3 to 5 inch totals over much of south central Nebraska. The swath of greatest rainfall amounts extended from Alma to Hastings to Columbus. This swath was surrounded by rainfall totals of 1 to 2 inches. The highest amo…

Flash Flood · Sep 2, 2018. A mesoscale convective system produced pockets of high winds and wind damage just after midnight on this Saturday morning. During the evening hours of Friday, scattered small clusters of multi-cell thunderstorms occurred over southwest Nebraska and northwest Kansas. The clusters over southwest Nebraska were moving to the east and the clusters over northwest Kansas were moving northeast. Between 10 and 11 PM CST, a…

Flood · Jun 4, 2015. For the third consecutive night, this time from the evening of Thursday the 4th into the early morning of Friday the 5th, several rounds of thunderstorms rumbled across much of the 24-county South Central Nebraska area. And for the second straight night, the majority of storms concentrated within the southeastern half of the area. Although the first few hours of evening convection yielded several hail reports up t…

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 Clay County

If a building in Clay 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.