South Carolina ice storm risk
Greenville County has the highest ice storm risk in South Carolina, scoring 99.6 out of 100 — rated "Very High" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
|---|---|---|---|
| 1 | Greenville County | 99.6 | Very High |
| 2 | Spartanburg County | 99.1 | Very High |
| 3 | York County | 98.6 | Very High |
| 4 | Richland County | 98.4 | Very High |
| 5 | Lexington County | 96.7 | Very High |
| 6 | Anderson County | 95.5 | Very High |
| 7 | Charleston County | 94.5 | Relatively High |
| 8 | Pickens County | 93.9 | Relatively High |
| 9 | Horry County | 93.1 | Relatively High |
| 10 | Lancaster County | 93.1 | Relatively High |
| 11 | Marlboro County | 92.7 | Relatively High |
| 12 | Aiken County | 92.1 | Relatively High |
| 13 | Cherokee County | 91.4 | Relatively High |
| 14 | Laurens County | 90.9 | Relatively High |
| 15 | Greenwood County | 90.7 | Relatively High |
| 16 | Oconee County | 90.5 | Relatively High |
| 17 | Newberry County | 88.7 | Relatively High |
| 18 | Union County | 88.4 | Relatively High |
| 19 | Beaufort County | 88 | Relatively High |
| 20 | Berkeley County | 87.9 | Relatively High |
| 21 | Orangeburg County | 87.9 | Relatively High |
| 22 | Florence County | 87.7 | Relatively High |
| 23 | Fairfield County | 87.1 | Relatively High |
| 24 | Abbeville County | 83.8 | Relatively High |
| 25 | Dorchester County | 83.4 | Relatively High |
| 26 | Kershaw County | 83 | Relatively High |
| 27 | Sumter County | 82.7 | Relatively High |
| 28 | Chesterfield County | 82.5 | Relatively High |
| 29 | Chester County | 82.3 | Relatively High |
| 30 | Dillon County | 78.3 | Relatively Moderate |
| 31 | Georgetown County | 76.4 | Relatively Moderate |
| 32 | Williamsburg County | 75.2 | Relatively Moderate |
| 33 | Darlington County | 74.5 | Relatively Moderate |
| 34 | Marion County | 72.7 | Relatively Moderate |
| 35 | Saluda County | 70.3 | Relatively Moderate |
| 36 | Edgefield County | 69.8 | Relatively Moderate |
| 37 | Clarendon County | 66.6 | Relatively Moderate |
| 38 | Hampton County | 65.5 | Relatively Moderate |
| 39 | Colleton County | 63 | Relatively Moderate |
| 40 | McCormick County | 59.5 | Relatively Low |
| 41 | Calhoun County | 58.6 | Relatively Low |
| 42 | Bamberg County | 57.8 | Relatively Low |
| 43 | Allendale County | 51.8 | Relatively Low |
| 44 | Barnwell County | 47 | Relatively Low |
| 45 | Lee County | 44.9 | Relatively Low |
| 46 | Jasper County | 31.5 | Relatively Low |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Ice Storm risk nationally:
Other hazard risks in South Carolina:
Frequently asked questions
What is the highest ice storm risk county in South Carolina?
Greenville County, SC has the highest ice storm risk in South Carolina, with a FEMA National Risk Index score of 99.6 out of 100 (rated "Very High").
How many counties in South Carolina are rated Very High for ice storm risk?
6 of 46 scored South Carolina counties are rated "Very High" for ice storm risk by FEMA's National Risk Index.
What causes ice storm risk in South Carolina?
Ice storm risk covers damaging freezing rain and sleet accumulation, which collapses power lines, trees, and structures. The highest-risk counties cluster in a band from eastern Texas and Arkansas through the Carolinas and New England, where warm Gulf moisture overruns cold arctic air most frequently. Ice storms cause catastrophic and long-lasting power outages. Ice storm and sleet events are reported at forecast-zone level in NOAA Storm Events and are not included in county-level counts.