Grundy County, Iowa: hazard risk
FEMA rates Grundy County's overall risk Very Low (score 13.1 of 100, higher than 13% of rated U.S. counties). Its storm record holds 558 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 |
|---|---|---|---|
| Drought | Relatively Moderate | 89.2 | $2.7M |
| Hail | Relatively Low | 70.3 | $956K |
| Winter Weather | Relatively Low | 57.4 | $144K |
| Strong Wind | Relatively Low | 41.6 | $739K |
| Tornado | Relatively Low | 34.8 | $1.1M |
| Cold Wave | Relatively Low | 30.3 | $736K |
| Ice Storm | Very Low | 21.4 | $31K |
| Riverine Flooding | Very Low | 14.2 | $3.0M |
| Landslide | Very Low | 11.9 | $64 |
| Earthquake | Very Low | 10.1 | $17K |
| Heat Wave | Very Low | 9.4 | $27K |
| Hurricane | Very Low | 9.3 | $3K |
| Wildfire | Very Low | 8.0 | $4K |
| Lightning | Very Low | 3.4 | $20K |
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 | 120 | 0 | $3.7M | 45th of 99 | 1631st of 3,080 |
| Hail | 91 | 0 | $23M | 73rd of 99 | 1308th of 3,080 |
| Winter storms | 91 | 1 | $2.0M | 45th of 99 | 811th of 3,077 |
| Floods | 56 | 0 | $36M | 46th of 99 | 826th of 3,080 |
| Heavy rain | 50 | 0 | – | 21st of 99 | 158th of 3,080 |
| Tornadoes | 41 | 1 | $20M | 37th of 99 | 543rd of 3,080 |
| High wind and dust storms | 37 | 0 | $1.8M | 23rd of 99 | 539th of 3,080 |
| Extreme cold | 29 | 0 | $5.9M | 25th of 99 | 393rd of 3,076 |
| Drought | 26 | 0 | $105M | 42nd of 99 | 911th of 3,063 |
| Heat | 3 | 0 | $177K | 89th of 99 | 1795th of 3,076 |
| Lightning | 1 | 0 | $156K | 75th of 99 | 1909th 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 Grundy County record: every hazard by year and month, the deadliest events and FEMA's declarations.