Story County flood history
Iowa · From FEMA's flood insurance and disaster data · Updated 2026-10-08
FEMA's National Flood Insurance Program (NFIP) data lists 286 flood insurance claims in Story County, Iowa since 1978. The NFIP paid $13.1 million on them (building, contents and Increased Cost of Compliance payments, in the dollars of the year paid).
The year with the most claims was 2010, with 78.
In the last ten years (2017–2026) there were 8 claims, and the average paid claim was $16,923.
31% of the claims with a recorded flood zone came from buildings outside FEMA's high-risk zones (rated zones B, C and X).
About 0.3% of homes in Story County, Iowa had an NFIP flood policy in FEMA's latest count (95 of 34,139 residential buildings). In the high-risk flood zones (Special Flood Hazard Areas), it was 8% (43 of 568).
Since 2000, FEMA has made 8 flood-related disaster declarations covering Story County, Iowa. The most recent was DR-4942-IA (Severe Storms and Flooding), declared September 1, 2026.
NFIP claims by year
Show as a table
| Year | Claims | Paid |
|---|---|---|
| 2026 | 3 | $82,224 |
| 2025 | 1 | $202 |
| 2018 | 3 | $17,163 |
| 2017 | 1 | $1,952 |
| 2016 | 4 | $35,996 |
| 2015 | 2 | $2,888 |
| 2014 | 1 | $0 |
| 2013 | 6 | $32,839 |
| 2010 | 78 | $8.3 million |
| 2008 | 35 | $1.7 million |
| 2007 | 2 | $6,035 |
| 2005 | 1 | $0 |
| 2004 | 4 | $42,703 |
| 2001 | 2 | $16,383 |
| 1999 | 1 | $0 |
| 1996 | 34 | $391,247 |
| 1993 | 72 | $2.0 million |
| 1991 | 5 | $66,925 |
| 1990 | 23 | $423,503 |
| 1987 | 1 | $0 |
| 1984 | 5 | $3,875 |
| 1979 | 2 | $341 |
Named flood events
| Event | Year | Claims | Paid |
|---|---|---|---|
| Midwest Flooding | 1993 | 72 | $2.0 million |
| Flooding | 1990 | 20 | $423,144 |
| Storm | 2008 | 9 | $102,955 |
How many homes have flood insurance
FEMA counts 95 residential NFIP policies in Story County, against 34,139 residential buildings (0.3%). Of the 568 residential buildings in high-risk flood zones (Special Flood Hazard Areas), 43 have an NFIP policy (8%). Private flood policies aren't in these counts.
Whether you're required to carry flood insurance depends on your flood zone and your mortgage. See do I need flood insurance?
Flood-related disaster declarations
| Declaration | Declared | Event | Help for individuals |
|---|---|---|---|
| DR-4942-IA | Sep 1, 2026 | Severe Storms and Flooding | No |
| DR-4784-IA | May 24, 2024 | Severe Storms, Tornadoes, and Flooding | Yes |
| DR-4386-IA | Aug 20, 2018 | Severe Storms, Tornadoes, Straight-Line Winds, and Flooding | No |
| DR-4126-IA | Jul 2, 2013 | Severe Storms, Tornadoes, and Flooding | No |
| DR-4016-IA | Aug 24, 2011 | Severe Storms, Straight-Line Winds, and Flooding | No |
| DR-1930-IA | Jul 29, 2010 | Severe Storms, Flooding, and Tornadoes | Yes |
| DR-1763-IA | May 27, 2008 | Severe Storms, Tornadoes, and Flooding | Yes |
| DR-1518-IA | May 25, 2004 | Severe Storms, Tornadoes, and Flooding | Yes |
Check your own address
County numbers can't tell you about a single building. Look up your property on FEMA's flood map, then read what your flood zone means. More counties: all of Iowa.
Where these numbers come from
All figures on this page are calculated from FEMA's public OpenFEMA datasets:
- NFIP Redacted Claims (v3) (FEMA (OpenFEMA)): NFIP claims since 1978, downloaded 2026-10-08. Dollar amounts are what the NFIP paid, not adjusted for inflation. Claims filed under private flood insurance aren't included.
- NFIP Residential Penetration Rates (v1) (FEMA (OpenFEMA)): NFIP residential policy contracts in force (as of August 3, 2026) divided by FEMA's count of residential buildings from the National Structure Inventory. FEMA notes that inventory is incomplete in some counties, which can inflate the rate. Private flood policies aren't counted.
- Disaster Declarations Summaries (v2) (FEMA (OpenFEMA)): disaster declarations, downloaded 2026-10-08. We count a declaration as flood-related when FEMA lists flooding (or a dam or levee break) as its incident type or a designated incident type, or the declaration's title mentions flooding.
FEMA's redacted claims data doesn't identify properties, and FEMA notes that some records lack a county or flood zone. See how we use the data.