FEMA claims · Douglas County
Most basement flooding in Douglas County happens outside the flood zone
We pulled every basement flood-insurance claim FEMA has released for Douglas County, Nebraska: 354 claims on homes with a finished or unfinished basement. Here is where the water actually showed up.
22% of those claims came from homes outside the mapped floodplain.
That is 72 of 331 claims with a rated flood zone. Look only at claims caused by rainfall or snowmelt soaking in, the seepage kind rather than a river coming up, and the share climbs to 32% (43 of 136).
The real number is almost certainly higher
Every claim here comes from a home that carried flood insurance. Near a floodplain, a federally backed mortgage all but forces you to buy it. Away from one, almost nobody does. So the homes in this data lean heavily toward the flood zone, and the out-of-zone basements that flooded without insurance never show up at all.
So read 22% as a floor. It is the share we can prove for Douglas County, and the true share of basement flooding outside the mapped zone is higher. This is not a flooding rate, so please do not quote it as one.
What this means if you own a home in Douglas County
Being outside the mapped flood zone is not a clean bill of health. Most of the basement claims here came from rain and surface water soaking in, not a river topping its banks, and that kind of water does not follow the floodplain line. A FEMA map that puts you outside the zone is answering a different question than whether your basement stays dry.
What actually keeps water out of a basement: grading and gutters that carry water away from the foundation, a working sump pump, and interior or exterior waterproofing where the problem keeps coming back. A standard homeowners policy does not cover flood damage either, so flood insurance is a separate call, and outside the high-risk zone it is usually cheaper.
To see your own property's rated zone, look it up at FEMA's Flood Map Service Center. If your basement already takes on water, the Douglas County city pages below have local waterproofing and sump-pump costs.
Douglas County claims by rated flood zone
The zone FEMA had each property in when it flooded. Zones starting with A or V are the Special Flood Hazard Area, where flood insurance is effectively mandatory. Everything else sits outside it.
| Flood zone | Risk category | Basement claims |
|---|---|---|
| AE | High-risk (SFHA) | 165 |
| X | Outside the flood zone | 50 |
| AO | High-risk (SFHA) | 46 |
| No rated zone | Unrated | 23 |
| A | High-risk (SFHA) | 18 |
| A09 | High-risk (SFHA) | 13 |
| C | Outside the flood zone | 11 |
| B | Outside the flood zone | 11 |
What the codes mean: X, B, and C are low-to-moderate risk, outside FEMA's high-risk area. Zones starting with A (AE, AH, AO, and similar) are the high-risk Special Flood Hazard Area, where flood insurance is effectively required. D means the risk was never studied. "No rated zone" means the claim carried no zone.
Basement flooding in Douglas County: FAQ
Why would my basement flood in Douglas County if I am not in a FEMA flood zone?+
Most basement water is not a river overflowing. It is rain and surface runoff against the foundation, a high water table, or a failed sump pump, and none of that follows the flood-zone line. In Douglas County, 22% of basement flood claims came from homes outside the mapped high-risk zone.
Do I need flood insurance in Douglas County if I am outside the flood zone?+
A standard homeowners policy does not cover flood damage, and flood insurance is a separate policy. Outside the high-risk zone it is optional and usually cheaper. The claims here show basement flooding does happen outside the zone, so it is worth pricing rather than assuming you are covered.
How do I find my flood zone in Douglas County?+
Look up your address at FEMA's Flood Map Service Center (msc.fema.gov). It shows the official rated flood zone for your property, the same zone system used in this data.
Where this comes from
The source is FEMA's NFIP redacted claims dataset (openFEMA FimaNfipClaims v2), filtered to buildings recorded with a finished or unfinished basement. Crawlspaces are out. A property counts as inside the floodplain when its rated zone starts with A or V, the Special Flood Hazard Area. Everything else is outside. 23 claims carry no rated zone, so we report them but keep them out of the percentage.
This is county data, not city. FEMA redacts the city field, so Douglas County is the finest honest level we can show. It takes in suburbs and unincorporated land, and the cities we cover inside it map to this county.
The claims run from 1978 to 2025.
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