Delaware County, Iowa: hazard risk
FEMA rates Delaware County's overall risk Relatively Low (score 49.7 of 100, higher than 49% of rated U.S. counties). Its storm record holds 697 events since 1950.
FEMA's rating for each hazard
These are FEMA's county-wide model ratings and this county's storm record. They are not an assessment of any property, address or building, and not insurance advice: a property's risk depends on its own elevation, construction and location.
FEMA gives each hazard its own rating, and a rating does not follow the score from one hazard to the next: a hazard with a higher score can carry a lower rating than another. The table sorts by FEMA's rating, then by score (0 to 100, the county against every other county for that hazard).
| Hazard | Risk rating | Score | Expected annual loss |
|---|---|---|---|
| Hail | Relatively Moderate | 86.4 | $1.4M |
| Drought | Relatively Moderate | 81.0 | $1.0M |
| Strong Wind | Relatively Moderate | 70.0 | $1.0M |
| Landslide | Relatively Low | 67.9 | $5K |
| Riverine Flooding | Relatively Low | 61.7 | $10M |
| Tornado | Relatively Low | 58.5 | $1.8M |
| Cold Wave | Relatively Low | 54.9 | $1.2M |
| Winter Weather | Relatively Low | 42.5 | $53K |
| Ice Storm | Relatively Low | 28.7 | $31K |
| Lightning | Relatively Low | 28.1 | $107K |
| Heat Wave | Very Low | 34.0 | $179K |
| Earthquake | Very Low | 24.6 | $46K |
| Hurricane | Very Low | 19.4 | $6K |
| Wildfire | Very Low | 12.4 | $4K |
Source: FEMA National Risk Index, December 2025 release. A model of future loss, not a count of past events. FEMA's National Risk Index map.
What the record holds
| Hazard | Records | Deaths | Damage | Rank in state | Rank in U.S. |
|---|---|---|---|---|---|
| Severe thunderstorm wind | 222 | 0 | $6.2M | 18th of 99 | 1183rd of 3,080 |
| Winter storms | 166 | 1 | $95K | 16th of 99 | 401st of 3,077 |
| Hail | 152 | 0 | $7.6M | 46th of 99 | 990th of 3,080 |
| Floods | 44 | 0 | $76M | 83rd of 99 | 1299th of 3,080 |
| Tornadoes | 40 | 0 | $100M | 26th of 99 | 437th of 3,080 |
| Extreme cold | 24 | 0 | $499K | 77th of 99 | 653rd of 3,076 |
| High wind and dust storms | 10 | 0 | $184K | 97th of 99 | 2022nd of 3,080 |
| Drought | 8 | 0 | $28M | 95th of 99 | 1848th of 3,063 |
| Heavy rain | 7 | 0 | $8K | 71st of 99 | 846th of 3,080 |
| Heat | 4 | 0 | – | 79th of 99 | 1730th of 3,076 |
| Lightning | 4 | 0 | $40K | 33rd of 99 | 979th of 3,080 |
Source: NOAA NCEI Storm Events Database, 1950 to 2026-06-30; damage in 2025 dollars. Search the record at NCEI.
The full Delaware County record: every hazard by year and month, the deadliest events and FEMA's declarations.