Hazard Plain Automated baseline

Marlboro County, SC

Risk-assessment baseline packet

County FIPS:
45069
Release:
2026-10
Data as of:
2026-09-30
Storm Events data through:
2026-06-30

Hazard Plain is an independent product built from public federal data. It is not a FEMA document and is not reviewed or endorsed by FEMA or any state agency.

Hazard Plain release 2026-10, as of 2026-09-30.

Summary

Plan status as of 2026-09-30: Approved, expires 2029-02-01. Plan: Pee Dee COG (FEMA plan 108603), approved 2024-02-02.

Since the plan was approved on 2024-02-02: 3 new hazard declarations (3 incidents): EM-3606-SC (Hurricane Debby), EM-3619-SC (Hurricane Helene), EM-3632-SC (Severe Winter Storm).

NOAA Storm Events records since that date: 15 records (data through 2026-06-30).

Highest expected annual loss (FEMA National Risk Index, modeled total; see B1-a): Hurricane ($3,246,709 a year), Inland Flooding ($2,925,170) and Tornado ($1,690,364).

Repetitive-loss flood properties now: FMA RL 0, SRL 0 (44 CFR 77.2); any definition: 2.

The tables that follow are organized by the items of FEMA's Local Mitigation Plan Review Tool, Element B (B1-a to B2-c); each heading says which item its tables support.

Plan clock

Status:
Approved, expires 2029-02-01
Plan:
Pee Dee COG (FEMA plan 108603)
Approved:
2024-02-02
Days to expiry:
855

What changed since your last plan (approved 2024-02-02)

New federal declarations:
3 new hazard declarations (3 incidents): EM-3606-SC (Hurricane Debby), EM-3619-SC (Hurricane Helene), EM-3632-SC (Severe Winter Storm)
Storm Events records since approval:
15 records (data through 2026-06-30)
Repetitive loss now:
FMA RL 0, SRL 0 (44 CFR 77.2); any definition: 2
Repeat-flood change:
this release sets the baseline count.

Sources: 1, 2, 4, 6 (numbered list at the end)

Plan status for every jurisdiction listed in this county

Source: 1

JurisdictionTypeStatusPlanApprovedExpiresDays to expirynegative = days since expiryNotes
Marlboro County (unincorporated area)UnincorporatedApproved, expires 2029-02-01Pee Dee COG (FEMA plan 108603)2024-02-022029-02-01855
Bennettsville cityCityApproved, expires 2029-02-01Pee Dee COG (FEMA plan 108603)2024-02-022029-02-01855
Blenheim townTownApproved, expires 2029-02-01Pee Dee COG (FEMA plan 108603)2024-02-022029-02-01855this jurisdiction approved 2024-12-03
Clio townTownApproved, expires 2029-02-01Pee Dee COG (FEMA plan 108603)2024-02-022029-02-01855this jurisdiction approved 2024-12-03
McColl townTownApproved, expires 2029-02-01Pee Dee COG (FEMA plan 108603)2024-02-022029-02-01855this jurisdiction approved 2024-12-03
Tatum townTownApproved, expires 2029-02-01Pee Dee COG (FEMA plan 108603)2024-02-022029-02-01855this jurisdiction approved 2025-02-07

Plan 108603 covers 23 other participants, named in the Excel file.

State plan status and tribal plans in this state: see the state page.

Supports FEMA checklist item B1-a: hazard identification

Hazards NRI does not cover (local data needed)

  • dam failure (incl. upstream dams)
  • levee failure
  • flash flood as its own subtype
  • ice jams
  • debris flows
  • erosion (riverine and coastal)
  • land subsidence and sinkholes
  • expansive soils

The 18 National Risk Index hazards, ranked by expected annual loss (EAL)

Sources: 5, 6

Rank by EALHazardNRI risk ratingEAL ratingEAL buildingsmodeled dollars per yearEAL agriculturemodeled dollars per yearCost of expected deaths and injuriesFEMA's dollar value per year, not property damageEAL total (see note)modeled dollars per yearStorm Events records, 1996 to 2026-06-30countStorm Events coverage note
1HurricaneRelatively ModerateRelatively Moderate$2,422,366$735,653$88,690$3,246,7095
2Inland FloodingRelatively LowVery Low$2,800,667$8,497$116,006$2,925,17017
3TornadoRelatively ModerateRelatively Low$519,676$3,441$1,167,247$1,690,3647
4Cold WaveRelatively LowRelatively Low$1,417$44,239$726,161$771,8180No recorded events in Storm Events since 1996 (data through 2026-06-30).
5Ice StormRelatively HighRelatively High$206,270n/a$492,001$698,2717
6Strong WindRelatively ModerateRelatively Moderate$156,857$55,638$349,976$562,471183Includes 3 High Wind and 4 Strong Wind records (NOAA non-thunderstorm wind types, outside NRI's Strong Wind definition).
7EarthquakeRelatively LowRelatively Low$359,116n/a$197,666$556,782Storm Events does not record earthquakes.
8Heat WaveRelatively LowRelatively Low$22$217$391,338$391,5774
9LightningRelatively ModerateRelatively Low$7,793n/a$172,488$180,2813
10WildfireRelatively LowRelatively Low$110,572$649$22,278$133,4990No recorded events in Storm Events since 1996 (data through 2026-06-30).
11HailRelatively LowVery Low$79,079$11,149$20,206$110,43551
12DroughtRelatively LowRelatively Lown/a$90,557n/a$90,55710
13Winter WeatherRelatively LowRelatively Low$264$238$30,919$31,42121
14LandslideVery LowVery Low$53n/a$3$560Declared 1 time; no Storm Events record of this type.

Total = buildings + agriculture + population equivalence; FEMA values each expected death (or 10 injuries) at $13.7 million (2024 dollars).

NRI risk rating combines expected annual loss with social vulnerability and community resilience; EAL rating rates expected annual loss alone. Both compare this county with all U.S. counties.

Local data needed: state and local wildfire and landslide records (Storm Events records these hazards only in part).

Not applicable to this county per NRI, with no federal declaration and no Storm Events record since 1996: avalanche, coastal flooding, tsunami and volcanic activity. That is the evidence for leaving them out of the plan.

The state hazard mitigation plan also lists hazards for this county; FEMA asks the plan to explain any hazard it leaves out.

Supports FEMA checklist item B1-b: hazard location

Affects the whole county (national data give no location within it): Cold Wave, Drought, Hail, Heat Wave, Ice Storm, Lightning, Strong Wind and Winter Weather.

Inland Flooding: The FEMA Flood Insurance Rate Map (FIRM) is the required location source for flooding. See the FEMA Flood Map Service Center (https://msc.fema.gov) for this county.

Hazards that vary within the county: highest-rated census tracts

Source: 5

HazardHighest-rated census tractsNRI risk rating, score 0 to 100
Earthquaketract 9602.01 (Relatively Moderate, 81.6); tract 9603.01 (Relatively Moderate, 81.2); tract 9604 (Relatively Low, 76.0)
Hurricanetract 9603.01 (Relatively High, 94.1); tract 9604 (Relatively High, 93.6); tract 9601 (Relatively High, 92.7)
Landslidetract 9601 (Very Low, 75.3); tract 9603.02 (Very Low, 59.3); tract 9602.02 (Very Low, 58.7)
Tornadotract 9603.01 (Very High, 93.7); tract 9604 (Very High, 93.5); tract 9602.01 (Relatively High, 91.5)
Wildfiretract 9601 (Relatively Moderate, 91.8); tract 9604 (Relatively Moderate, 91.7); tract 9605 (Relatively Moderate, 89.0)

Up to 3 census tracts per hazard, highest National Risk Index rating first, then highest score; a tract number is the Census tract number (for example 9602.01 is Census Tract 9602.01). FEMA's Resilience Analysis and Planning Tool maps the National Risk Index for every tract: https://www.fema.gov/emergency-managers/practitioners/resilience-analysis-and-planning-tool

Supports FEMA checklist item B1-c: hazard extent

Extent: scale, observed range and worst recorded event per hazard

Sources: 6, 7

HazardScaleRecordscount and yearsObserved rangeWorst recorded eventMost damaging (when different)How it applies to jurisdictionsNote
Cold/Wind Chill, Extreme Cold/Wind Chillwind chill0Wind chill: in event narratives only (local data needed).
Frost/Freeze (outside NRI's Cold Wave definition)crop damage0Temperature: in event narratives only (local data needed).
DroughtU.S. Drought Monitor scale (D0 to D4)10 records, 1999 to 2008 (10 zone-level)1 day to 191 days (median 8.5 days); 4 with a recorded value191 days (about 6.3 months), 2007-10-01 to 2008-04-08, a run of 7 consecutive Storm Events drought records, zone-levelCountywide (zone-level records).Storm Events enters a drought at D2 or worse east of the Rockies and D3 or worse from the Rockies west (NWS Instruction 10-1605); NRI drought counts D3 and D4 only.
EarthquakeModified Mercalli (local data)0Storm Events does not record earthquakes; the USGS earthquake catalog is the source.
Hailhail size (inches)61 records, 1962 to 20240.7 in to 1.75 in (median 0.88 in); 61 with a recorded value1.75 in hail, 2000-08-18; same size also recorded on 1982-06-10, 1986-05-25, 1994-04-15, 1999-05-14Hail, 2012-07-01, $1,000 property; $0 crops (2012 dollars)Event records naming jurisdictions in the plan: Bennettsville city (12 records), Clio town (9 records), Blenheim town (6 records), Tatum town (1 record).
Excessive Heat, Heatheat index (in event narratives)4 records, 2011 to 2015 (4 zone-level)2 days to 8 days (median 3 days); 4 with a recorded value8 consecutive days, 2015-06-19 to 2015-06-26, zone-levelCountywide (zone-level records).Heat index: in event narratives only (local data needed).
Hurricane, Tropical Storm, Tropical DepressionSaffir-Simpson5 records, 2004 to 2022 (5 zone-level)Strongest recorded: Tropical Storm record, 2016-10-08 to 2016-10-10, $1,000,000 property; crops not reported (2016 dollars); NWS zone SCZ017Countywide (zone-level records).Storm Events files every zone of a storm's episode under the storm's type; flooding from the storm is filed as Flood or Flash Flood records.
Ice StormSperry-Piltz ice scale (local data)7 records, 1998 to 2015 (7 zone-level)Ice Storm, 2004-01-26, $3,600,000 property; crops not reported (2004 dollars); NWS zone SCZ017Countywide (zone-level records).Ice thickness: in event narratives only (local data needed).
Flash Flood, Flood, Lakeshore Flooddamage and flood days (flood depth: FIRM)17 records, 1996 to 2024Flash Flood, 2016-10-08, $250,000 property; $0 crops (2016 dollars)Event records naming jurisdictions in the plan: Bennettsville city (7 records), Blenheim town (1 record), Clio town (1 record), Tatum town (1 record).Flood depth: see the FEMA Flood Insurance Rate Map. Storm Events damage is often $0 or blank for floods, major ones included; FEMA Public Assistance by declaration (B1-d) shows which floods cost the most.
Debris Flownone (count and damage only)0Physical measure: in event narratives only (local data needed).
Lightningannualized frequency (the measure FEMA's Local Mitigation Planning Handbook names)3 records, 1998 to 2001Lightning, 1998-03-09, $75,000 property; crops not reported (1998 dollars)Event records naming jurisdictions in the plan: Clio town (2 records), Bennettsville city (1 record).Storm Events lists lightning with damage or casualties; physical measure in event narratives only (local data needed).
High Wind and Strong Wind (outside NRI's Strong Wind definition)wind speed (kt and mph)7 records, 1996 to 2016 (7 zone-level)43 kt (49 mph) to 55 kt (63 mph) (median 43 kt (49 mph)); 7 with a recorded value55 kt (63 mph) estimated gust, High Wind, 2004-03-07; NWS zone SCZ017Strong Wind, 2015-03-05, $50,000 property; $0 crops, reported for the zone (2015 dollars)Countywide (zone-level records).
Thunderstorm Windwind speed (kt and mph)221 records, 1957 to 202550 kt (58 mph) to 91 kt (105 mph) (median 52 kt (60 mph)); 176 with a recorded value91 kt (105 mph) estimated gust, Thunderstorm Wind, 2020-04-13Event records naming jurisdictions in the plan: Bennettsville city (27 records), Clio town (22 records), Blenheim town (12 records), Tatum town (6 records).Speeds under 20 kt (likely entry errors) are left out of the observed range.
TornadoEnhanced Fujita (Fujita before Feb 2007)15 records, 1955 to 2024F/EF0 to F/EF4 (median F/EF1); 15 with a recorded valueF4 tornado, 1984-03-28, 5 mi path length (whole path, pre-1996), 2,600 yd wide, $25,000,000 property; crops not recorded (1984 dollars), 2 direct deaths, 115 direct injuriesEvent records naming jurisdictions in the plan: Bennettsville city (2 records), Blenheim town (1 record), Clio town (1 record).Before 1996 a tornado is listed once, under the county where it began, with its whole path's rating and length; from 1996 on, each county lists its own segment. Length is not used to rank tornadoes (see Methods).
Wildfireacres burned (local data)0Acres burned: in event narratives only (local data needed).
Winter Storm, Heavy Snow, Blizzard, Lake-Effect Snow, Winter Weather, Sleetnone in data (snowfall: local data)21 records, 2000 to 2026 (21 zone-level)No damage reported in 21 records.Countywide (zone-level records).Snow depth: in event narratives only (local data needed).

Storm Events records are more complete after 1996; before 1996 only Tornado (from 1950), Hail and Thunderstorm Wind (from 1955) exist. Zone-level records whose zone no NWS zone-county file places in this county (mostly before 2020) are not counted here (the Methods page explains the zone matching).

Dollars are nominal (as reported), labeled with the year; not adjusted for inflation.

Supports FEMA checklist item B1-d: previous occurrences

Federal declarations for this county: 26 declarations covering 17 separate hazard incidents counted in this packet (declarations for the same incident count once; non-natural and evacuation-only declarations are not counted).

Federal disaster declarations for this county

Sources: 1, 2, 3

DeclaredIncident beganFEMA numberTypeTitleMapped hazardCounty Public Assistancefederal share obligated, nominal dollarsFlagsNotes
2026-01-232026-01-21EM-3632-SCEmergencySevere Winter StormWinter Weatherno Public Assistance recordednew since last plan; within last 5 years
2024-09-262024-09-25EM-3619-SCEmergencyHurricane HeleneHurricane (primary); also designated: Inland Flooding, Landslide, Tornadono Public Assistance recordednew since last plan; within last 5 years
2024-08-052024-08-04EM-3606-SCEmergencyHurricane DebbyHurricane (primary); also designated: Inland Floodingno Public Assistance recordednew since last plan; within last 5 years
2023-08-312023-08-29EM-3597-SCEmergencyHurricane IdaliaHurricane (primary); also designated: Inland Flooding$13,766.87in the 12 months before plan approval; within last 5 years
2022-11-212022-09-25DR-4677-SCMajor disasterHurricane IanHurricaneno Public Assistance recordedwithin last 5 years
2022-09-292022-09-25EM-3585-SCEmergencyHurricane IanHurricaneno Public Assistance recordedwithin last 5 yearssame incident as DR-4677
2020-05-012020-04-12DR-4542-SCMajor disasterSevere Storms, Tornadoes, and Straight-Line WindsStrong Wind; TornadoPA not declared for this county
2020-03-272020-01-20DR-4492-SCMajor disasterCOVID-19 PandemicNon-natural, not counted$16,293
2020-03-132020-01-20EM-3470-SCEmergencyCOVID-19Non-natural, not countedno Public Assistance recordedsame incident as DR-4492
2019-09-012019-08-31EM-3421-SCEmergencyHurricane DorianHurricaneno Public Assistance recorded
2018-09-162018-09-08DR-4394-SCMajor disasterHurricane FlorenceHurricane$1,769,523.80
2018-09-102018-09-08EM-3400-SCEmergencyHurricane FlorenceHurricaneno Public Assistance recordedsame incident as DR-4394
2017-10-162017-09-06DR-4346-SCMajor disasterHurricane IrmaHurricaneno Public Assistance recorded
2017-09-072017-09-06EM-3386-SCEmergencyHurricane IrmaHurricaneno Public Assistance recordedsame incident as DR-4346
2016-10-112016-10-04DR-4286-SCMajor disasterHurricane MatthewHurricane$1,036,034.92
2016-10-062016-10-04EM-3378-SCEmergencyHurricane MatthewHurricaneno Public Assistance recordedsame incident as DR-4286
2015-10-052015-10-01DR-4241-SCMajor disasterSevere Storms and FloodingInland Floodingno Public Assistance recorded
2015-10-032015-10-01EM-3373-SCEmergencySevere Storms and FloodingInland Floodingno Public Assistance recordedsame incident as DR-4241
2014-02-122014-02-10EM-3369-SCEmergencySevere Winter StormIce Stormno Public Assistance recorded
2005-09-102005-08-29EM-3233-SCEmergencyHurricane Katrina EvacuationHurricane: evacuation support, not a local hazard event; not countedno Public Assistance recorded
2004-10-072004-09-06DR-1566-SCMajor disasterTropical Storm FrancesHurricanePA not declared for this county
2000-01-312000-01-22DR-1313-SCMajor disasterSevere Winter StormWinter Weather$111,544.93
1999-09-211999-09-14DR-1299-SCMajor disasterHurricane Floyd Major Disaster DeclarationsHurricane$19,866.88
1999-09-151999-09-14EM-3145-SCEmergencyHurricane Floyd Emergency DeclarationsHurricaneno Public Assistance recordedsame incident as DR-1299
1989-09-221989-09-21DR-843-SCMajor disasterHurricane HugoHurricaneno Public Assistance recorded
1984-03-301984-03-28DR-700-SCMajor disasterSevere Storms & TornadoesTornadono Public Assistance recorded

County Public Assistance: applicants the FEMA record places in this county, including any state agencies FEMA files there; statewide rows are listed on the state page; federal share obligated, nominal dollars.

Statewide declarations

Source: 2

DeclaredIncident beganFEMA numberTypeTitleMapped hazard
1955-08-201955-08-20DR-44-SCMajor disasterHurricanesHurricane (primary); also designated: Inland Flooding
1954-10-171954-10-17DR-29-SCMajor disasterHurricaneHurricane (primary); also designated: Inland Flooding

FEMA recorded these with designated area Statewide and no county, so they are listed on every county page in the state and not counted with county rows. Local data needed: whether each one affected this county.

Public Assistance filed under this county for declarations that do not list it: 2 rows, $96,840.91

Sources: 2, 3

FEMA numberDeclaredTitleApplicantPA obligatedfederal share obligated, nominal dollars
DR-4166-SC2014-03-12Severe Winter StormMarlboro Electric Cooperative, Inc.$84,855.93
DR-1509-SC2004-02-13Severe Ice StormMarlboro Electric Cooperative, Inc.$11,984.98

FEMA's Public Assistance summaries file these applicants under this county, but FEMA's declaration rows for these disasters do not designate it (an electric cooperative or district serving several counties, for example). Not in any declaration row above and not counted.

Previous occurrences by hazard, with explicit no-event rows

Sources: 2, 6, 7

HazardStorm Events records, all years on file(years in the Period column)Since plan approvalrecordsIn the 12 months before plan approvalrecordsLast 5 yearsrecordsDeclared incidents, all yearsseparate disastersDeclared since approvalseparate disastersPeriodStatement
Cold Wave0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Drought10000001996 to 2026-06-30
Earthquake000000Storm Events does not record earthquakes; the USGS earthquake catalog is the source.
Hail61203001955 to 2026-06-30
Heat Wave4000001996 to 2026-06-30
Hurricane50011121996 to 2026-06-30
Ice Storm7000101996 to 2026-06-30
Inland Flooding17404421996 to 2026-06-30
Landslide0000111996 to 2026-06-30No Storm Events records of this type; 1 federal declared incident (see declarations table)
Lightning3000001996 to 2026-06-30
Strong Wind22851018101955 to 2026-06-30Includes 3 High Wind and 4 Strong Wind records.
Tornado15101311950 to 2026-06-30
Wildfire0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Winter Weather21304211996 to 2026-06-30

Notable Storm Events records

Sources: 1, 6, 7

DateEvent typeMagnitude or extentDamagenominal dollarsDeaths, injuriesdirect onlyLocationWhy listed
2020-04-13Thunderstorm Wind91 kt (105 mph) estimated gust$300,000 property; $0 crops (2020 dollars)0, 0WALLACEB1-c worst recorded: Thunderstorm Wind
2016-10-08Flash Flood$250,000 property; $0 crops (2016 dollars)0, 0BENNETTSVILLEB1-c worst recorded: Flash Flood, Flood, Lakeshore Flood
2016-10-08Tropical Storm$1,000,000 property; crops not reported, reported for the zone (2016 dollars)0, 0NWS zone SCZ017 (MARLBORO), zone-levelB1-c worst recorded: Hurricane, Tropical Storm, Tropical Depression
2015-06-19Heatdamage not reported0, 0NWS zone SCZ017 (MARLBORO), zone-levelB1-c worst recorded: Excessive Heat, Heat
2007-10-01Droughtdamage not reported0, 0NWS zone SCZ017 (MARLBORO), zone-levelB1-c worst recorded: Drought
2004-03-07High Wind55 kt (63 mph) estimated gustdamage not reported0, 0NWS zone SCZ017 (MARLBORO), zone-levelB1-c worst recorded: High Wind and Strong Wind
2004-01-26Ice Storm$3,600,000 property; crops not reported, reported for the zone (2004 dollars)0, 0NWS zone SCZ017 (MARLBORO), zone-levelB1-c worst recorded: Ice Storm
2003-02-17Ice Storm$30,000 property; crops not reported, reported for the zone (2003 dollars)1, 2NWS zone SCZ017 (MARLBORO), zone-leveldeaths or injuries recorded
2000-08-18Hail1.75 indamage not reported0, 0MC COLLB1-c worst recorded: Hail
1998-03-09Lightning$75,000 property; crops not reported (1998 dollars)0, 0CLIOB1-c worst recorded: Lightning
1984-03-28TornadoF4, 5 mi path length (whole path, pre-1996), 2,600 yd wide$25,000,000 property; crops not recorded (1984 dollars)2, 115location not recordeddeaths or injuries recorded
1984-03-28TornadoF4, 14 mi path length (whole path, pre-1996), 700 yd wide$25,000,000 property; crops not recorded (1984 dollars)7, 100location not recordeddeaths or injuries recorded

The full list is in the Excel file, sheet "B1-d Storm Events history" (371 rows).

Location is the place NOAA recorded, as written in its data; it need not be a jurisdiction in this plan.

Local data needed: state-declared emergencies, from your state emergency management agency (federal data do not include them).

Tribal and special-area declarations in this state are listed on the state page.

Supports FEMA checklist item B1-e: probability of future events

Probability: FEMA annualized frequency and descriptor per hazard

Sources: 5, 6

HazardFEMA annualized frequency (modeled)unit per rowUnitIn plain termsDescriptorDescriptor basisNRI events or days in its record period (hail, wind and tornado are area-weighted, so can be fractional)NRI periodLocationNote
Cold Wave0.474event-days per yearabout 0.474 days per yearevent-days in 0 of 30 years, 1996 to 2025 (0%)92005-11-12 to 2024-11-12 (19 years)countywideNo Storm Events cold wave record, 1996 to 2025.
Drought19.6event-days per yearabout 19.6 days per yearLikely (from Storm Events: 5 of 30 years)event-days in 5 of 30 years, 1996 to 2025 (16.7%)6372000 to 2025 (25.25 years; D3 and D4 only)countywide
Earthquake0.00244annual probability at a locationchance a given location in the county has at least minor-damage shaking in a year: 0.244%not shownmodeledsee B1-fNo descriptor (Storm Events does not record earthquakes).
Hail3.52events per yearabout 3.52 per yearHighly likelyFEMA annualized frequency (modeled)133.9 (modeled)1986 to 2023 (38 years)countywide
Heat Wave7.74event-days per yearabout 7.74 days per yearLikely (from Storm Events: 3 of 30 years)event-days in 3 of 30 years, 1996 to 2025 (10%)1262005-11-12 to 2024-11-12 (19 years)countywide
Hurricane0.228events per yearabout 1 in 4 yearsLikelyFEMA annualized frequency (modeled)631851 to 2024 (Atlantic)see B1-fNRI counts hurricane and tropical storm tracks passing within storm-force wind range; federal declarations are in B1-d.
Ice Storm0.834event-days per yearabout 0.834 days per yearLikely (from Storm Events: 6 of 30 years)event-days in 6 of 30 years, 1996 to 2025 (20%)561946-12-31 to 2014-02-12 (67 years)countywide
Inland Flooding0.25event-days per yearabout 0.25 days per yearLikely (from Storm Events: 8 of 30 years)event-days in 8 of 30 years, 1996 to 2025 (26.7%)71996 to 2023 (28 years)see B1-f
Landslide0.0993events per year (modeled)about 1 in 10 yearsPossibleFEMA annualized frequency (modeled)not shownmodeledsee B1-f
Lightning56.3days per year with a strikeabout 56.3 days per yearHighly likelyFEMA annualized frequency (modeled)not shown1995 to 2023 (29 years; CONUS)countywide
Strong Wind3.59events per yearabout 3.59 per yearHighly likelyFEMA annualized frequency (modeled)1371986 to 2023 (38 years)countywide
Tornado0.252events per yearabout 1 in 4 yearsLikelyFEMA annualized frequency (modeled)not shown1950 to 2023 (EF2+); 1986 to 2023 (EF0-1)see B1-f
Wildfire0.00229annual probability at a locationchance a given location in the county burns in a year: 0.229%Storm Events records in 0 of 30 years, 1996 to 2025 (0%)not shownmodeledsee B1-fNo descriptor: no Storm Events record 1996 to 2025
Winter Weather2.47event-days per yearabout 2.47 days per yearLikely (from Storm Events: 13 of 30 years)event-days in 13 of 30 years, 1996 to 2025 (43.3%)472005-11-12 to 2024-11-12 (19 years)countywide

FEMA annualized frequency (modeled) is the National Risk Index v1.20 (December 2025) estimate of how often a hazard affects this county in a year; it is not recorded events divided by years, and its unit differs by hazard (events, event-days, or days with a lightning strike per year). For earthquake, wildfire, coastal flooding and tsunami the value is the chance (or number of events) at a location in the county, not across the county, so no "1 in N years" is given and the descriptor comes from Storm Events where it has a record (none for earthquake). The Methods page gives each hazard's method, from FEMA's National Risk Index Technical Documentation v1.20.

Where NRI gives event-days, the descriptor comes from the share of years with a Storm Events record; NRI's source records more events, so the two differ.

Descriptor scale used in this packet (defined per unit)

Sources: 5, 6

UnitDescriptorDefinition
events per yearHighly likely1 or more per year
events per yearLikelyabout once in 1 to 10 years
events per yearPossibleabout once in 10 to 100 years
events per yearUnlikelyless than once in 100 years
annual probabilityLikely10% to under 100% chance in a given year
annual probabilityPossible1% to under 10% chance in a given year
annual probabilityUnlikelyunder 1% chance in a given year
event-days (share of years)Highly likelyevent-days recorded in 90% or more of years
event-days (share of years)Likelyevent-days recorded in 10% to under 90% of years
event-days (share of years)Possibleevent-days recorded in some years but under 10% of years
lightning strike-daysHighly likelycloud-to-ground strikes on 1 or more days per year

Intensity bands: historical frequency (Storm Events)

Source: 6

HazardBandYearsEventscounty-coded recordsYears in periodEvents per yearevents / years
Hail1.00-1.99 in1996 to 202523300.767
Hail2.00 in+1996 to 20250300
Thunderstorm Wind (counted as NRI Strong Wind)50-64 kt1996 to 2025158305.27
Thunderstorm Wind (counted as NRI Strong Wind)65 kt+1996 to 202517300.567
Thunderstorm Wind (counted as NRI Strong Wind)unmeasured or below 50 kt1996 to 20251300.0333
TornadoEF0-11996 to 20257300.233
TornadoEF2-31996 to 20250300
TornadoEF4-51996 to 20250300
Tornadounrated (EFU)1996 to 20250300

The bands show how often events of each severity were recorded in this county, to profile how severe events have been (FEMA's probability item asks for the range of intensities).

Hail smaller than 1 inch is not counted: on 2010-01-05 the National Weather Service raised its severe-hail threshold from 3/4 inch to 1 inch, so smaller reports became less common after 2009 (NWS Service Change Notice 09-52). NRI hail frequency uses a 0.75 inch threshold.

Optional: future conditions. Not a required item in the 2025 FEMA Local Mitigation Planning Policy Guide; some states ask for it. The federal Climate Mapping for Resilience and Adaptation (CMRA) site gives county exposure to future climate conditions (https://resilience.climate.gov/).

Supports FEMA checklist item B1-f: hazards that vary across jurisdictions

Range of census tract risk within the county

Source: 5

HazardTractsrated of allNRI risk score, 0 to 100Tracts by rating
MinMedianMax
Cold Wave8 of 860.475.983.8Relatively High 3, Relatively Moderate 5
Drought8 of 882.289.092.2Relatively Moderate 2, Relatively Low 6
Earthquake8 of 854.466.781.6Relatively Moderate 2, Relatively Low 6
Hail8 of 858.067.976.2Relatively Moderate 4, Relatively Low 4
Heat Wave8 of 848.369.280.9Relatively Moderate 6, Relatively Low 2
Hurricane8 of 887.591.394.1Relatively High 5, Relatively Moderate 3
Ice Storm8 of 894.998.099.0Very High 5, Relatively High 3
Inland Flooding8 of 811.638.884.2Relatively High 1, Relatively Moderate 1, Relatively Low 5, Very Low 1
Landslide8 of 826.554.575.3Very Low 8
Lightning8 of 862.281.891.7Relatively High 5, Relatively Moderate 3
Strong Wind8 of 882.291.094.9Relatively High 7, Relatively Moderate 1
Tornado8 of 868.285.093.7Very High 2, Relatively High 4, Relatively Moderate 2
Wildfire8 of 878.787.991.8Relatively Moderate 4, Relatively Low 4
Winter Weather8 of 853.268.878.9Relatively High 1, Relatively Moderate 7

Drought: Agriculture is all of NRI's expected annual loss for this hazard in the county, so the tract range mostly reflects where crop and livestock value is.

Rated tracts only: No Rating (score 0.0), Not Applicable and Insufficient Data tracts are counted but not used for the minimum, median and maximum.

The score ranks a tract against all U.S. tracts (100 = highest). The rating is FEMA's category for the tract's risk value, computed differently, so the two can disagree.

Frequency data for cold wave, drought, hail, heat wave, ice storm, lightning, strong wind and winter weather are county-wide or coarse (49 km grid or NWS zone), the same for every jurisdiction; the tract range mostly reflects where buildings and people are (crop and livestock value where a line above names agriculture).

Each jurisdiction (starting figures from federal data)

Sources: 1, 3, 4, 6

JurisdictionTypePlan statusRepetitive lossFMA RL and SRL (44 CFR 77.2); repeat-flood, any definitionPublic Assistance to this jurisdictionFEMA records matched by applicant name; federal share obligated, nominal dollarsEvent records naming this placeall years; since its planNotes
Marlboro County (unincorporated area)UnincorporatedApproved, expires 2029-02-01FMA RL 0, SRL 0; any 1$549,222.220 total; 0 since its planIncludes $8,578.41 for declarations not counted as hazard incidents (DR-4492-SC).
Bennettsville cityCityApproved, expires 2029-02-01FMA RL 0, SRL 0; any 1$1,000,782.9249 total; 2 since its planIncludes $7,714.59 for declarations not counted as hazard incidents (DR-4492-SC).
Blenheim townTownApproved, expires 2029-02-01FMA RL 0, SRL 0; any 0no Public Assistance recorded20 total; 0 since its plan
Clio townTownApproved, expires 2029-02-01FMA RL 0, SRL 0; any 0$80,881.6335 total; 0 since its plan
McColl townTownApproved, expires 2029-02-01FMA RL 0, SRL 0; any 0$45,426.080 total; 0 since its plan
Tatum townTownApproved, expires 2029-02-01FMA RL 0, SRL 0; any 0no Public Assistance recorded8 total; 1 since its plan

Repetitive-loss counts are for whole NFIP communities, which can extend beyond this county (see the note in B2-c).

County Public Assistance in B1-d also includes applicants filed under the county that are not jurisdictions in this plan (for example state agencies, special districts and nonprofits), so the jurisdiction rows add up to less.

Supports FEMA checklist items B2-a and B2-b: vulnerability and potential impacts

Local data needed

The table below gives county-level starting figures; the plan describes impacts for each jurisdiction and its own assets.

  • Critical facilities and lifelines per hazard
  • A problem statement per jurisdiction per hazard
  • Changes in development in hazard-prone areas since the last approval, or a statement of none (E1-a)
  • Future assets

County-level starter: exposure, expected annual loss and damage since the plan

Sources: 1, 2, 3, 5, 6, 7

HazardBuilding exposuremodeled dollarsAgriculture exposuremodeled dollarsPopulation exposedpeopleEAL buildingsmodeled dollars per yearEAL agriculturemodeled dollars per yearCost of expected deaths and injuriesFEMA's dollar value per year, not property damageEAL as % of exposurebuildings; agriculture where notedStorm Events damage since 2024-02-02county-coded records, property plus crops, nominal dollarsZone-level damage since planproperty plus crops, reported for the zonePublic Assistance since plannominal dollars; see noteNote
Cold Wave$4,270,695,691$102,764,69826,656$1,417$44,239$726,161under 0.0001%
Droughtn/a$31,833,323n/an/a$90,557n/a0.284% (agriculture)NRI has no building exposure for this hazard; agriculture shown
Earthquake$7,252,551,217n/a26,667$359,116n/a$197,6660.00495%
Hail$4,270,695,691$102,764,69826,656$79,079$11,149$20,2060.00185%$0
Heat Wave$4,270,695,691$102,764,69826,656$22$217$391,338under 0.0001%
Hurricane$4,270,695,691$102,764,69826,656$2,422,366$735,653$88,6900.0567%no Public Assistance recorded (2 declarations)
Ice Storm$4,270,695,691n/a26,656$206,270n/a$492,0010.00483%
Inland Flooding$4,269,442,237$2,342,732701$2,800,667$8,497$116,006n/a (see note)$4,000no Public Assistance recorded (2 declarations)NRI counts the full building value of any census block with some flood loss; this is not the value of buildings in the floodplain. Use local FIRM overlays for B2-a/B2-b.
Landslide$9,695,721n/a53$53n/a$30.000542%no Public Assistance recorded (1 declaration)
Lightning$4,270,695,691n/a26,656$7,793n/a$172,4880.000182%
Strong Wind$4,270,695,691$102,764,69826,656$156,857$55,638$349,9760.00367%$0
Tornado$4,270,695,691$102,764,69826,656$519,676$3,441$1,167,2470.0122%$2,000no Public Assistance recorded (1 declaration)
Wildfire$531,919,932$36,598,4826,423$110,572$649$22,2780.0208%
Winter Weather$4,270,695,691$102,764,69826,656$264$238$30,919under 0.0001%$0no Public Assistance recorded (1 declaration)

Totals since 2024-02-02 (Storm Events through 2026-06-30): 12 county-coded records, 12 with a damage value recorded (including $0), $6,000; 3 zone-level records, 3 with a damage value recorded (including $0), $0 reported for the zone; Public Assistance: none recorded on the 3 counted declarations.

FEMA does not split Public Assistance by hazard. A declaration mapped to several hazards is listed under each of them with its full amount, so the per-hazard column does not add up to the total; the unit total counts each declaration once.

NRI computes earthquake exposure on its own basis, so it exceeds the county building value in B2-a.

Supports FEMA checklist item B2-a: vulnerability (county context)

County context

Source: 5

MeasureValue
Population26,656
Building value (total, not at risk)$4,270,695,691
Agriculture value (total, not at risk)$102,764,698
NRI risk rating (all hazards)Relatively Low
Expected annual loss, buildings and agriculture, all hazards$7,614,430
Expected annual loss, population equivalence, all hazards (NRI values each statistical life at $13.7M; a modeled value of expected deaths and injuries, not property damage)$3,774,980
Social vulnerability ratingVery High
Community resilience ratingVery Low
NRI versionDecember 2025

FEMA's all-hazard expected annual loss adds buildings, agriculture and population equivalence; this table gives the property part and the population-equivalence part as separate rows.

Social vulnerability: higher means people are more likely to be harmed and slower to recover. Community resilience: lower means the community is less able to recover. High social vulnerability and low resilience both raise the NRI risk rating.

Supports FEMA checklist item B2-c: repetitive loss properties

Repetitive loss in this county, both definitions

Sources: 1, 4

DefinitionPropertiesSevere repetitive lossProperties
Repetitive loss, FMA definition (44 CFR 77.2)0Severe repetitive loss, FMA definition (44 CFR 77.2)0
Repetitive loss, NFIP insurance definition2Severe repetitive loss, NFIP insurance definition0

The state NFIP coordinator's list, the source FEMA's Handbook names, often uses the NFIP insurance definition (second row).

Repeat-flood properties: county and state-level rows

Sources: 1, 4

ScopeRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredproperties
County total0020200
of which: Marlboro County (unincorporated area)0010100
of which: Bennettsville city0010100
Statewide, no county in FEMA's file0020200

The statewide row counts properties FEMA's file gives with no county in this state; they are listed for reference and are not in this county's counts.

Repeat-flood properties by jurisdiction in the plan (NFIP community)

Sources: 1, 4

JurisdictionNFIP community IDRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredproperties
Marlboro County (unincorporated area)4501460010100
Bennettsville city4501470010100
Blenheim town4501480000000
Clio town4501490000000
McColl town4501500000000
Tatum town4501510000000

Counts by occupancy group for each jurisdiction are in the Excel file, sheet "B2-c Jurisdictions".

Jurisdiction rows are whole NFIP communities and need not add up to the county total: a community that extends into another county is counted in full on each jurisdiction row, while the county table counts only its part in this county.

County repeat-flood properties by occupancy group

Sources: 1, 4

Occupancy groupRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredproperties
single-family residential0020200
2 to 4 unit residential0000000
other residential0000000
non-residential0000000
not reported0000000

FEMA's occupancy groups have no institutional class; institutional properties are counted in non-residential or other residential in the table by occupancy group.

FMA RL and FMA SRL are the Flood Mitigation Assistance definitions (44 CFR 77.2), the ones the FEMA Local Mitigation Planning Policy Guide cites. NFIP repetitive loss (the FEMA insurance definition) is 2 or more claims over $1,000 in 10 years, and a property can leave that group once it is mitigated. Also shown: NFIP severe repetitive loss, any category, mitigated and currently insured. The Methods page gives the OpenFEMA field details.

Counts are aggregates of FEMA's public NFIP Multiple Loss Properties file (FEMA's data date 2026-08-02; file version 2026-08-04). No property is identified. County assignment is FEMA's geocode.

In this county 0 properties are FMA repetitive loss but not NFIP repetitive loss, and 2 properties are NFIP repetitive loss but not FMA repetitive loss.

Exact counts; no count suppression.

Sources

Tables cite these sources by number. The full list, for the plan's bibliography (FEMA review item A4-a):

  1. FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-29T134039Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)
  2. FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-29T162832Z, pulled 2026-09-30, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)
  3. FEMA, OpenFEMA PublicAssistanceFundedProjectsSummaries v1, version 2026-09-29T150754Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/PublicAssistanceFundedProjectsSummaries (API)
  4. FEMA, OpenFEMA NfipMultipleLossProperties v1, version 2026-08-04T164045Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/NfipMultipleLossProperties (API)
  5. FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-30, https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_Counties.zip (download, 25 MB), https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_CensusTracts.zip (download, 635 MB)
  6. NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-30, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/
  7. NOAA National Weather Service, NWS county-public forecast zones correlation file, version bp03mr20 to bp16ap26 (11 files; newest bp16ap26), pulled 2026-09-30, https://www.weather.gov/gis/ZoneCounty
  8. U.S. Census Bureau, Census 2024 Gazetteer, 2020 place by county, CT county-to-cousub crosswalk, version 2024-gazetteer, pulled 2026-09-30, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_counties_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_cousubs_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_place_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_unsd_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_elsd_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_scsd_national.zip, https://www2.census.gov/geo/docs/reference/codes2020/national_place_by_county2020.txt, https://www2.census.gov/geo/docs/reference/ct_change/ct_cou_to_cousub_crosswalk.xlsx (used to match place names and codes; no table prints its values)

What this packet is and what the plan adds

This packet is the federal data for the plan's risk assessment, organized by the items of FEMA's Local Mitigation Plan Review Tool, Element B. Each section heading names the item its tables support; the plan and FEMA's review decide whether the item is met.

The plan adds what only the community has: local data on assets, critical facilities, development and each jurisdiction's impacts; local hazard history, including state-declared emergencies; the mitigation strategy; and adoption.

How the federal data are built: National Risk Index values are FEMA's model, not counts of events. Storm Events is more complete from 1996; zone-level records are placed by forecast zone, not by location in the county. Public Assistance for a jurisdiction is matched by applicant name. The Methods page gives every rule and the known edge cases.

OpenFEMA disclaimer

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).

Reuse, citation and corrections

Reuse and citation: Hazard Plain text and tables are licensed under Creative Commons Attribution 4.0 International (CC BY 4.0, https://creativecommons.org/licenses/by/4.0/); credit Hazard Plain and the release. The underlying federal data are public domain; OpenFEMA data are also subject to the OpenFEMA terms and conditions.

Cite this: Hazard Plain (2026). Marlboro County, SC: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-30; County FIPS 45069). Automated baseline. https://hazardplain.org/sc/45069/ Built from FEMA OpenFEMA, the FEMA National Risk Index and NOAA NCEI Storm Events; source versions in the packet's Sources list.

Corrections: to report an error, name the packet, the table and what your records show. Contact: [email protected]

Hazard Plain release 2026-10. As of 2026-09-30; Storm Events data through 2026-06-30. Automated baseline.