Grant County, South Dakota: hazard risk
FEMA rates Grant County's overall risk Very Low (score 18.9 of 100, higher than 18% of rated U.S. counties). Its storm record holds 566 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 |
|---|---|---|---|
| Cold Wave | Relatively Moderate | 78.4 | $5.0M |
| Ice Storm | Relatively Moderate | 62.6 | $230K |
| Winter Weather | Relatively Low | 59.0 | $134K |
| Hail | Relatively Low | 53.3 | $466K |
| Drought | Relatively Low | 35.2 | $64K |
| Tornado | Relatively Low | 34.6 | $1.0M |
| Strong Wind | Relatively Low | 20.2 | $281K |
| Wildfire | Very Low | 54.6 | $94K |
| Landslide | Very Low | 36.3 | $771 |
| Heat Wave | Very Low | 30.9 | $217K |
| Riverine Flooding | Very Low | 17.3 | $3.2M |
| Earthquake | Very Low | 6.3 | $9K |
| Lightning | Very Low | 2.6 | $14K |
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. |
|---|---|---|---|---|---|
| Winter storms | 162 | 1 | $2.3M | 20th of 66 | 551st of 3,077 |
| Hail | 128 | 0 | $1.3M | 43rd of 66 | 1543rd of 3,080 |
| Severe thunderstorm wind | 84 | 0 | $168K | 43rd of 66 | 2296th of 3,080 |
| Extreme cold | 46 | 1 | – | 7th of 66 | 308th of 3,076 |
| Floods | 44 | 1 | $12M | 19th of 66 | 1511th of 3,080 |
| High wind and dust storms | 44 | 0 | – | 36th of 66 | 644th of 3,080 |
| Tornadoes | 22 | 0 | $1.1M | 29th of 66 | 1872nd of 3,080 |
| Drought | 16 | 0 | – | 42nd of 66 | 1530th of 3,063 |
| Heat | 9 | 0 | – | 30th of 66 | 1253rd of 3,076 |
| Lightning | 5 | 0 | $15K | 8th of 66 | 928th of 3,080 |
| Wildfires | 1 | 0 | – | 18th of 66 | 1017th of 2,972 |
Source: NOAA NCEI Storm Events Database, 1950 to 2026-06-30; damage in 2025 dollars. Search the record at NCEI.
The full Grant County record: every hazard by year and month, the deadliest events and FEMA's declarations.