Richland County, South Carolina Natural Disaster Risk
FEMA National Risk Index assessment · SC
MediumComposite Risk Score
National percentile: 93th
Richland County faces medium composite natural disaster risk (NRI Risk Index score 93.1, 93th national percentile), driven primarily by ice storm and lightning exposure. Expected annual loss across all 18 hazard types is $138M.
Source: FEMA National Risk Index v1.20 · Updated December 2025
Risk Overview
FEMA's National Risk Index rates Richland County at medium composite risk, with a National Risk Index score of 93.1 out of 100 — placing it in the 93rd national percentile and near the national midpoint for natural-disaster risk. The score blends Expected Annual Loss, Social Vulnerability, and Community Resilience across all 18 FEMA hazard types.
The county's risk is driven primarily by ice storm (freezing rain that coats surfaces in heavy, damaging ice) at Very High risk — $3M in expected annual loss and about 1.45 events per year; lightning (electrical discharges from storms that ignite fires and cause casualties) at High risk — $2M in expected annual loss and about 60.07 events per year; and strong wind (damaging straight-line winds outside of tornadoes and hurricanes) at High risk — $3M in expected annual loss and about 5.64 events per year. Across all hazards, FEMA estimates $138M in expected annual loss for a population of 416K.
Beyond physical exposure, Richland County has a low social vulnerability rating (how susceptible the population is to harm) and a high community resilience rating (its capacity to prepare for and recover from disasters). A less vulnerable population paired with strong resilience helps the community absorb and recover from events.
The federal record bears this out: Richland County has received 26 federal disaster declarations since 1977, including 15 for hurricane events and 2 for tropical storm events. The most recent was Severe Winter Storm (winter storm), declared in January 2026.
Among 46 South Carolina counties, Richland County ranks #7 for overall natural disaster risk.
Top Hazards
All 18 Hazard Risks
| Ice Storm | Very High | 1.45 / yr | $3M |
| Lightning | High | 60.07 / yr | $2M |
| Strong Wind | High | 5.64 / yr | $3M |
| Tornado | High | 0.56 / yr | $12M |
| Heat Wave | Medium | 4.37 / yr | $6M |
| Riverine Flood | High | 3.82 / yr | $74M |
| Hurricane | High | 0.19 / yr | $19M |
| Earthquake | Medium | 0.00 / yr | $11M |
| Hail | Medium | 3.87 / yr | $2M |
| Winter Weather | High | 1.89 / yr | $318K |
| Landslide | Low | 0.42 / yr | $31K |
| Cold Wave | Medium | 0.21 / yr | $4M |
| Wildfire | Low | 0.00 / yr | $179K |
| Drought | Low | 15.16 / yr | $61K |
| Avalanche | Very Low | 0.00 / yr | $0 |
| Coastal Flood | Very Low | 0.00 / yr | $0 |
| Tsunami | Very Low | 0.00 / yr | $0 |
| Volcanic Activity | Very Low | 0.00 / yr | $0 |
Disaster History
Richland County has received 26 federal disaster declarations since 1977, most recently Severe Winter Storm in January 2026. Most frequent causes: Hurricane (15), Tropical Storm (2), Biological (2).
| Declared | Type | Disaster |
|---|---|---|
| January 2026 | Winter Storm | Severe Winter Storm |
| September 2024 | Hurricane | Hurricane Helene |
| September 2024 | Tropical Storm | Hurricane Helene |
| August 2024 | Tropical Storm | Hurricane Debby |
| August 2023 | Hurricane | Hurricane Idalia |
| November 2022 | Hurricane | Hurricane Ian |
| September 2022 | Hurricane | Hurricane Ian |
| March 2020 | Biological | Covid-19 Pandemic |
| March 2020 | Biological | Covid-19 |
| September 2019 | Hurricane | Hurricane Dorian |
Showing the 10 most recent of 26 declarations.
Source: FEMA Disaster Declarations Summaries (OpenFEMA).
Frequently Asked Questions
What is the overall natural disaster risk for Richland County?
Richland County has a composite FEMA National Risk Index score of 93.1 out of 100, placing it in the Medium category and the 93th national percentile. This combines Expected Annual Loss, Social Vulnerability, and Community Resilience across 18 hazard types.
What are the top natural hazards in Richland County?
The three highest-rated hazards are Ice Storm (Very High, $3M EAL), Lightning (High, $2M EAL), Strong Wind (High, $3M EAL). These account for most of the county's expected annual losses.
How does Richland County compare to other South Carolina counties?
Richland County ranks #7 of 46 South Carolina counties for overall natural disaster risk, with a medium rating.
How many federally declared disasters has Richland County had?
FEMA records 26 federal disaster declarations for Richland County since 1977, most often 15 for hurricane events and 2 for tropical storm events. The most recent was Severe Winter Storm, declared in January 2026.
What does Expected Annual Loss (EAL) mean?
EAL is FEMA's estimate of average annual dollar losses from natural hazards, calculated from historical event data and exposure models. Richland County's $138M EAL is a statistical average, not a guarantee for any specific year or address.