FEMA Records
8
Total declarations
South Carolina · FEMA + NOAA + National Risk Index
Chester County, SC
8 FEMA disaster declarations (2020–2026), with a FEMA National Risk Index rating of Relatively Low. Most common hazard: Hurricane.
- 8
- FEMA declarations
- 3
- Major disasters
- 43
- NRI risk · Relatively Low
- Hurricane
- Top hazard
FEMA's National Risk Index places Chester County in the top 57% of U.S. counties for overall natural-hazard risk, and its FEMA disaster-declaration count is higher than 90% of all 2,729 counties tracked.
How does Chester County compare?
- Chester County
- 8
- South Carolina county avg
- 7.4
- National county avg
- 3.7
How disaster-prone is Chester County?
Chester County, South Carolina has recorded 8 FEMA disaster declarations between 2020 and 2026, of which 3 were classified as Major Disaster declarations (DR) requiring federal individual and public assistance. That puts the county's average at 1.3 declarations per year across a 6-year record, or roughly 8% above the South Carolina county average of 7.4 and 114% above the national county average of 3.7.
The dominant disaster type on record is Hurricane, with 4 of 8 declarations falling under this category. FEMA's data shows an elevated National Risk Index composite of 43.2/100 for this county (Relatively Low rating). Expected Annual Loss comes in at Very Low (roughly $10.8M in annualized losses). Social vulnerability (Relatively High) and community resilience (Relatively Moderate) both factor into how that raw exposure plays out on the ground. Of the 18 hazards FEMA models, Ice Storm stands out as the sharpest exposure here, rated Relatively High.
Taken together, these indicators put Chester County at a moderate relative risk level, not the calmest county on record, but not among the most disaster-prone either.
Risk Assessment
Risk Level
Moderate
vs. South Carolina Avg
+8%
State avg: 7.4
vs. National Avg
+114%
National avg: 3.7
Avg Per Year
1.3
Over 6 years
FEMA NRI 8-hazard radar - Chester County
How to read this radar
The radar plots Chester County's relative exposure to the eight headline natural hazards used by the FEMA National Risk Index. Each axis is the qualitative NRI risk rating (Very Low through Very High) re-expressed on a 0-100 scale so that the polygon shape lets you compare a county against another at a glance. A rounder polygon means broad multi-hazard exposure; a spiky polygon means one or two dominant hazards drive most of the modeled risk.
NRI Source
FEMA 2023
Latest NRI release
County FIPS
45023
SC state code
Source: FEMA National Risk Index FEMA National Risk Index Per-county per-hazard ratings, 2023 release
Disaster Types
Hurricane 4
Tropical Storm 2
Winter Storm 1
Severe Storm 1
Declaration Types
What DR / EM / FM mean
FEMA categorizes declarations as Major Disasters (DR), Emergencies (EM), or Fire Management Assistance (FM).
Emergency - 5 62.5%
of all 8 declarations
Major Disaster - 3 37.5%
of all 8 declarations
FEMA Declarations Timeline
| Year | Declarations | |
|---|---|---|
| 2026 | 1 | |
| 2024 | 3 | |
| 2023 | 2 | |
| 2022 | 1 | |
| 2020 | 1 | |
Disaster Declarations
| DR# | Title | Type | Incident | Date |
|---|---|---|---|---|
| 3632 | SEVERE WINTER STORM | EM | Winter Storm | 2026-01-23 |
| 4829 | HURRICANE HELENE | DR | Hurricane | 2024-09-29 |
| 3619 | HURRICANE HELENE | EM | Tropical Storm | 2024-09-26 |
| 3606 | HURRICANE DEBBY | EM | Tropical Storm | 2024-08-05 |
| 3597 | HURRICANE IDALIA | EM | Hurricane | 2023-08-31 |
| 4677 | HURRICANE IAN | DR | Hurricane | 2022-11-21 |
| 3585 | HURRICANE IAN | EM | Hurricane | 2022-09-29 |
| 4479 | SEVERE STORMS, TORNADOES, STRAIGHT-LINE WINDS, AND FLOODING | DR | Severe Storm | 2020-03-17 |
Storm Events in South Carolina
| Storm Type | Events | Fatalities | Injuries | Property Damage |
|---|---|---|---|---|
| Thunderstorm Wind | 6,347 | 11 | 43 | $11.9M |
| Hail | 1,288 | 0 | 0 | $25.1M |
| Flash Flood | 1,077 | 20 | 35 | $150.5M |
| Strong Wind | 404 | 4 | 13 | $721.8K |
| Tornado | 329 | 9 | 110 | $127.1M |
Source: NOAA Storm Events Database NOAA Storm Events Database State-level aggregated data, 2015–2025
FEMA National Risk Index
Overall Risk
Relatively Low
Score: 43.2/100
Expected Annual Loss
Very Low
$10.8M/year
Social Vulnerability
Relatively High
Community Resilience
Relatively Moderate
Hazard Risk Breakdown
Ice Storm Relatively High
Lightning Relatively Moderate
Tornado Relatively Moderate
Earthquake Relatively Low
Cold Wave Relatively Moderate
Strong Wind Relatively Moderate
Hurricane Relatively Low
Wildfire Very Low
Landslide Very Low
Heat Wave Relatively Low
Drought Relatively Low
Hail Very Low
Winter Weather Very Low
Source: FEMA National Risk Index (NRI) FEMA National Risk Index (NRI) Ratings reflect relative scores among all US counties. Data: hazards.fema.gov/nri
Counties with Similar Risk in South Carolina
Disaster Preparedness Guides
Related
Frequently Asked Questions
How many natural disasters has Chester County, South Carolina had?
Chester County, South Carolina has received 8 FEMA disaster declarations from 2020 to 2026. Of these, 3 were major disaster declarations.
What is the most common disaster type in Chester County?
The most common disaster type in Chester County is Hurricane, with 4 declarations. Other disaster types include Tropical Storm (2), Winter Storm (1), Severe Storm (1).
How does Chester County's disaster risk compare to the South Carolina average?
Chester County has 8 disaster declarations, which is 8% higher than the South Carolina county average of 7.4 declarations. Compared to the national county average of 3.7, it is 114% higher.
How many major FEMA disaster declarations has Chester County received?
Chester County has received 3 major disaster declarations, representing 38% of all 8 disaster declarations. Major disaster declarations typically involve significant damage requiring federal assistance.
What types of storms are most common in South Carolina?
The most common storm types in South Carolina include Thunderstorm Wind (6,347 events), Hail (1,288 events), Flash Flood (1,077 events). NOAA storm event data covers severe weather from 2015 to 2025.
What was the worst year for disasters in Chester County?
The most active year for disaster declarations in Chester County was 2024, with 3 declarations. The county has FEMA disaster data spanning 2020 to 2026.
What is the overall disaster risk level for Chester County?
With 8 FEMA disaster declarations on record, Chester County lands in the moderate-risk band, not unusually disaster-prone, but not spared either.
What is the FEMA National Risk Index score for Chester County?
According to the FEMA National Risk Index, Chester County, South Carolina has an overall risk score of 43.2 out of 100 (Relatively Low). The county's social vulnerability rating is Relatively High and community resilience is Relatively Moderate. The Expected Annual Loss (EAL) score is Very Low, representing $10.8M in annualized losses.
Which natural hazard poses the greatest risk to Chester County?
Based on FEMA NRI data, the highest-risk natural hazard in Chester County is Ice Storm (risk rating: Relatively High). Other significant hazards include Lightning (Relatively Moderate) and Tornado (Relatively Moderate). These scores are based on FEMA's analysis of historical event frequency, exposed assets, and community vulnerability.
Data Sources & Methodology
Disaster declaration data comes from the FEMA OpenFEMA Disaster Declarations Summaries v2 API, which includes all federally declared disasters, emergencies, and fire management assistance grants.
Storm event data is sourced from the NOAA Storm Events Database (2015–2025), which tracks significant weather events including thunderstorms, tornadoes, floods, and winter storms.
This data is provided for informational purposes only. FEMA disaster declarations represent federal response actions and may not capture all local emergencies or weather events.
What this means for Chester County
Chester County, SC has 8 FEMA disaster declarations on record, a moderate historical disaster load, 8% above the South Carolina county average.
- Its most common federal declaration type is emergency (5 of 8) - know the hazards most likely here before they happen. South Carolina overview
- See how this county ranks against the rest of the country for disaster frequency. Most-disaster rankings
- Read how to read FEMA declarations, NRI risk scores, and what they do and don't tell you. Disaster-data guide
Historical declaration counts describe past federal response, not a forecast. For current threats, follow the National Weather Service and local officials; in an emergency call 911.
Read our methodology - how this data is sourced, computed, and verified.
All federal data sources used on this page
- FEMA OpenFEMA, Disaster Declarations Summaries v2 - all federally-declared disasters for this county. fema.gov/openfema/disaster-declarations
- FEMA National Risk Index (NRI) - per-county per-hazard risk ratings and expected annual loss. hazards.fema.gov/nri
- NOAA NCEI Storm Events Database - state-level storm/severe-weather event records, 2015–2025. ncdc.noaa.gov/stormevents
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainHazard Editorial
Verify with FEMA → · Verify with FEMA NRI → · Verify with NOAA →
Every figure on PlainHazard is rendered directly from FEMA federal disaster data, no number is typed in by an editor. This page draws directly on FEMA federal disaster data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.