Greenville County, South Carolina: Natural Disaster Risk and History
Greenville County, South Carolina has a Relatively Moderate natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 94.0 out of 100, higher than about 94% of US counties, with ice storms, lightning and tornadoes scoring highest of its 18 hazards and $169 million a year in expected losses.
OpenFEMA lists 24 federal disaster declarations that included Greenville County since 1977, not counting 2 for COVID-19; the latest is DR-4908-SC (Severe Winter Storm, declared 7 April 2026). NOAA's Storm Prediction Center recorded 38 tornadoes touching Greenville County from 1950 to 2025.
Live weather alerts for South Carolina All official warnings Latest FEMA declarations
Population 525,347 Buildings worth $120 billion Area 804 sq mi Risk rank in South Carolina 5 of 46 FIPS 45045
All 18 hazards, highest risk first
FEMA National Risk Index| Hazard | Risk rating | Score | Expected loss a year | How often | Events in record |
|---|---|---|---|---|---|
| Ice storm | Very High | 99.6 | $6.3 million | about 1.8 a year | 124 |
| Lightning | Very High | 98.3 | $3.8 million | about 56 a year | 529,007 strikes |
| Tornado | Relatively High | 96.6 | $20 million | about once every 2.2 years | 31 |
| Inland flooding | Relatively High | 96.0 | $104 million | about 2.8 a year | 78 |
| Cold wave | Relatively High | 95.8 | $15 million | about once every 2.6 years | 7.2 |
| Earthquake | Relatively Moderate | 92.8 | $9.5 million | about once every 394 years | — |
| Hail | Relatively Moderate | 91.1 | $2.2 million | about 4.8 a year | 182 |
| Strong wind | Relatively High | 89.3 | $2.2 million | about 2.6 a year | 98 |
| Heat wave | Relatively Moderate | 83.3 | $2.1 million | about 1.1 a year | 18 |
| Hurricane | Relatively Moderate | 83.0 | $3.5 million | about once every 23 years | 16 |
| Landslide | Relatively Low | 79.2 | $16,589 | about once every 1.1 years | — |
| Winter weather | Relatively Low | 56.0 | $91,008 | about 4.8 a year | 90 |
| Wildfire | Very Low | 55.1 | $72,513 | rarer than once in 1,000 years | — |
| Drought | Relatively Low | 48.3 | $148,728 | about 42 a year | 1,554 |
| Avalanche | Not Applicable | — | — | — | — |
| Coastal flooding | Not Applicable | — | — | — | — |
| Tsunami | Not Applicable | — | — | — | — |
| Volcanic activity | Not Applicable | — | — | — | — |
Score: FEMA's percentile among US counties that face the hazard (higher = more risk). Expected loss: FEMA's modelled average yearly loss to buildings, people (as a statistical value) and crops. How often: FEMA's annualised frequency of the hazard in the county; for some hazards it counts event-days, so it is a rough guide, not a forecast. "Not Applicable" means FEMA does not model that hazard here.
Federal disaster declarations 24
Most common: Hurricane 11, Severe Ice Storm 3, Winter Storm 2, Fire 2.
| Decade | Declarations | Incident types |
|---|---|---|
| 1970s | 1 | Drought |
| 2000s | 4 | Severe Ice Storm ×2, Hurricane ×2 |
| 2010s | 9 | Hurricane ×5, Fire, Flood, Severe Storm, Severe Ice Storm |
| 2020s | 10 | Hurricane ×4, Winter Storm ×2, Tropical Storm ×2, Fire, Severe Storm |
The last 10
Widest declarations that included Greenville County
- Severe Winter Storm (2026, EM-3632-SC): 46 South Carolina counties designated.
- Hurricane Helene (2024, EM-3619-SC): 46 South Carolina counties designated.
- Hurricane Debby (2024, EM-3606-SC): 46 South Carolina counties designated.
Named storms in its declarations: Hurricane Helene (2024), Hurricane Debby (2024), Hurricane Idalia (2023), Hurricane Ian (2022), Hurricane Dorian (2019), Hurricane Florence (2018), Hurricane Irma (2017), Hurricane Matthew (2016), Hurricane Katrina (2005), Tropical Storm Frances (2004).
Not counted above: 2 COVID-19 ("Biological") declarations — in 2020 every US county was included. South Carolina also had 2 statewide declarations with no county list.
Tornado record since 1950 38
| Tornadoes touching the county | 38 |
|---|---|
| Strongest-rated | (E)F3 ×1 |
| Peak month | April (8) |
| Deadliest | 10 May 1952, F3, 22.7 mi path, 2 killed, 4 injured |
| Longest path | 13 Apr 1980, F2, 33.4 mi path, 0 killed, 5 injured |
| Most recent | 25 Sep 2024, EF0, 0.2 mi path |
| Deaths / injuries on those paths | 2 / 24 |
| Rating | (E)F0 | (E)F1 | (E)F2 | (E)F3 | (E)F4 | (E)F5 | Unrated |
|---|---|---|---|---|---|---|---|
| Count | 18 | 11 | 8 | 1 | 0 | 0 | 0 |
| Decade | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
|---|---|---|---|---|---|---|---|---|
| Count | 2 | 6 | 5 | 2 | 6 | 3 | 9 | 5 |
Deaths and injuries are for each tornado's whole path, which can run beyond this county. F-scale ratings before February 2007, Enhanced Fujita (EF) after.
How Greenville County compares with its 5 nearest counties
| County | Distance | Overall risk | Score | Top hazard |
|---|---|---|---|---|
| Greenville County (this page) | — | Relatively Moderate | 94.0 | Ice storm |
| Pickens County | 32 km | Relatively Low | 77.6 | Ice storm |
| Spartanburg County | 35 km | Relatively Moderate | 90.6 | Ice storm |
| Polk County, NC | 47 km | Very Low | 36.9 | Landslide |
| Anderson County | 48 km | Relatively Moderate | 87.2 | Cold wave |
| Henderson County, NC | 50 km | Relatively Moderate | 83.8 | Ice storm |
Nearest by distance between county centres. Every county in South Carolina, ranked.
Vulnerability and resilience
| Social vulnerability | Relatively Low 21.9 |
|---|---|
| Community resilience | Relatively Moderate 57.3 |
| Community risk factor | 0.91 |
| Expected annual loss, all hazards | $169 million |
FEMA scales expected losses up where social vulnerability is high (people who may find it harder to prepare, evacuate or recover) and down where community resilience is high. A factor above 1 raises the risk score. For social vulnerability a high rating is worse; for resilience a high rating is better.
Prepare for Greenville County's main hazards
- Right now: National Weather Service alerts for South Carolina · all official warnings on Global Incident Tracker.
- Ice storm: Power outages now · Carbon monoxide in winter
- Lightning: Weather alerts for South Carolina
- Tornado: Is there a tornado warning now?
- Your property's flood zone: FEMA Flood Map Service Center ↗ — this page cannot tell you that.
- Official preparedness guidance: Ready.gov ↗ and your county emergency management office.
What this page shows, and what it misses
FEMA's National Risk Index rates a whole county against every other US county; it is a planning-level estimate for nationwide comparison, not a flood-zone map and not a substitute for a local risk assessment or the risk to one home. Declarations are presidential disaster, emergency and fire management declarations that named this county; state declarations and SBA or USDA designations are not included. Tornadoes are counted when the county is one of up to four listed on the track; 670 tornadoes that crossed a state line carry no county list in NOAA's file and are left out.
Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties - v1.20.0 (December 2025). Retrieved from https://services.arcgis.com/XG15cJAlne2vxtgt/ArcGIS/rest/services/National_Risk_Index_Counties/FeatureServer/0/query on November 2, 2026, 1:20 PM EST. This product uses the Federal Emergency Management Agency’s National Risk Index dataset API or downloadable datasets but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Federal Emergency Management Agency (FEMA), OpenFEMA Dataset: Disaster Declarations Summaries - v2, retrieved from https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries on November 2, 2026, 1:21 PM EST. This product uses the Federal Emergency Management Agency's OpenFEMA API, but is not endorsed by FEMA. The Federal Government or FEMA cannot vouch for the data or analyses derived from these data after the data have been retrieved from the Agency's website(s).
Tornado records: NOAA/NWS Storm Prediction Center, Severe Weather Database, tornadoes 1950–2025 (https://www.spc.noaa.gov/wcm/data/1950-2025_actual_tornadoes.csv, downloaded 2 November 2026). Public domain; not endorsed by NOAA. Compiled by Global Incident Tracker.
Questions about Greenville County
What natural disasters is Greenville County, South Carolina most at risk from?
Greenville County, South Carolina has a Relatively Moderate natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 94.0 out of 100, higher than about 94% of US counties, with ice storms, lightning and tornadoes scoring highest of its 18 hazards and $169 million a year in expected losses.
How many federal disaster declarations has Greenville County had?
OpenFEMA lists 24 federal disaster declarations that included Greenville County since 1977, not counting 2 for COVID-19; the latest is DR-4908-SC (Severe Winter Storm, declared 7 April 2026). Another 2 South Carolina declarations were made statewide without a county list.
How many tornadoes have hit Greenville County?
NOAA's Storm Prediction Center recorded 38 tornadoes touching Greenville County from 1950 to 2025. The deadliest: 10 May 1952, F3, 22.7 mi path, 2 killed, 4 injured (deaths and injuries are for the whole path).
Is the National Risk Index a flood zone map?
No. The National Risk Index is a planning-level estimate for a whole county, built for nationwide comparison. It does not tell you the flood zone or the risk of a single property: for that, look up the address on FEMA's Flood Map Service Center (msc.fema.gov) and ask your local floodplain manager.