Hazard Plain Preview: automated baseline

Florence County, SC

Risk-assessment baseline packet

Unit
County area 45041
Release
2026-10
As of
2026-09-28
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.

A starting point for the plan's risk assessment (FEMA Local Mitigation Plan Review Tool, Element B). It does not replace local data or FEMA review. Section headings say which FEMA review item each table supports; whether an item is satisfied is decided by the plan and its reviewers.

Hazard Plain release 2026-10, as of 2026-09-28. Independent product; not a FEMA document.

Plan clock

Status
No approved plan on record
Plan
none
Approved
none
Expires
none
As of
2026-09-28
Update underway
FEMA tracker shows a plan awaiting revisions

FEMA's plan status data lists no approved plan for this jurisdiction.

What changed since your last plan

Not available. No approved plan on record, so there is no approval date to count from.

Sources

FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-26T121003Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)

FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-27T010817Z, pulled 2026-09-28, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)

NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

FEMA, OpenFEMA NfipMultipleLossProperties v1, version 2026-08-04T164045Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/NfipMultipleLossProperties (API)

Plan status for every jurisdiction listed in this county

JurisdictionTypeStatusPlanApprovedExpiresDays to expirynegative = days since expiryUpdate underwayNotes
Florence County (unincorporated area)UnincorporatedNo approved plan on recordnonenonenoneFEMA tracker shows a plan awaiting revisions
Coward townTownNo approved plan on recordnonenonenoneFEMA tracker shows a plan awaiting revisions
Florence cityTownNo approved plan on recordnonenonenoneFEMA tracker shows a plan awaiting revisions
Johnsonville cityTownNo approved plan on recordnonenonenoneFEMA tracker shows a plan awaiting revisions
Lake City cityCityNo approved plan on recordnonenonenoneFEMA tracker shows a plan awaiting revisions
Olanta townTownNo approved plan on recordnonenonenoneFEMA tracker shows a plan awaiting revisions
Pamplico townTownNo approved plan on recordnonenonenoneFEMA tracker shows a plan awaiting revisions
Quinby townTownNo approved plan on recordnonenonenoneFEMA tracker shows a plan awaiting revisions
Scranton townTownNo approved plan on recordnonenonenoneFEMA tracker shows a plan awaiting revisions
Timmonsville townTownNo approved plan on recordnonenonenoneFEMA tracker shows a plan awaiting revisions

Source

FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-26T121003Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)

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

Supports B1-a: hazards

Hazards NRI does not cover: check locally

  • 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)

Rank by EALHazardNRI risk ratingEAL ratingEAL buildingsmodeled dollars per yearEAL agriculturemodeled dollars per yearEAL population equivalencestatistical value of life and injury, $13.7M per life, not property damageEAL total (see note)modeled dollars per yearStorm Events records since 1996countEvidence for an omissionNRI Not Applicable, no declaration and no Storm Events record since 1996Storm Events coverage note
1HurricaneRelatively HighRelatively High$21,284,202$489,194$1,011,534$22,784,9304
2Inland FloodingRelatively ModerateRelatively Moderate$16,669,755$14,471$891,714$17,575,93957
3TornadoRelatively HighRelatively High$3,333,599$1,727$5,602,990$8,938,31616
4EarthquakeRelatively ModerateRelatively Moderate$4,572,224$2,101,749$6,673,973Not in Storm Events. Storm Events coverage of this hazard is limited; absence is not evidence of low risk.
5Heat WaveRelatively ModerateRelatively Moderate$177$142$2,909,323$2,909,6424
6Cold WaveRelatively ModerateRelatively Moderate$9,721$21,485$1,575,727$1,606,9320No recorded events in Storm Events since 1996 (data through 2026-06-30).
7HailRelatively ModerateRelatively Moderate$1,326,995$5,085$194,983$1,527,063122
8Strong WindRelatively ModerateRelatively Moderate$163,275$64,367$641,783$869,425300Includes 8 High Wind records and 3 Strong Wind records, event types the NRI definition of this hazard leaves out.
9LightningRelatively HighRelatively Moderate$54,467$715,611$770,07816
10WildfireRelatively LowRelatively Low$555,180$363$100,584$656,1260No recorded events in Storm Events since 1996 (data through 2026-06-30). Storm Events coverage of this hazard is limited; absence is not evidence of low risk.
11Ice StormRelatively HighRelatively High$501,275$95,277$596,5524
12Winter WeatherRelatively ModerateRelatively Moderate$6,574$15$145,737$152,32721
13DroughtRelatively LowRelatively Low$108,812$108,8128
14LandslideVery LowVery Low$492$4$4960Declared 1 time; no Storm Events record of this type. Storm Events coverage of this hazard is limited; absence is not evidence of low risk.
15Coastal FloodingNo RatingNo Expected Annual Losses$0$0$00No recorded events in Storm Events since 1996 (data through 2026-06-30).
AvalancheNot ApplicableNot Applicable0NRI rates avalanche Not Applicable for this county, and no federal declaration for this county names it.No recorded events in Storm Events since 1996 (data through 2026-06-30).
TsunamiNot ApplicableNot Applicable0NRI rates tsunami Not Applicable for this county, and no federal declaration for this county names it.No recorded events in Storm Events since 1996 (data through 2026-06-30). Storm Events coverage of this hazard is limited; absence is not evidence of low risk.
Volcanic ActivityNot ApplicableNot Applicable0NRI rates volcanic activity Not Applicable for this county, and no federal declaration for this county names it.No recorded events in Storm Events since 1996 (data through 2026-06-30). Storm Events coverage of this hazard is limited; absence is not evidence of low risk.

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

Sources

FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-28, 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)

NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

Check your state hazard mitigation plan's hazard list for this county; explain any hazard you drop.

Supports B1-b: location

Where each hazard occurs

HazardLocationCensus tracts ratedrated of all tracts
AvalancheCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.0 of 36
Coastal FloodingThe 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.0 of 36
Cold WaveAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.36 of 36
DroughtAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.34 of 36
EarthquakeCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.36 of 36
HailAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.36 of 36
Heat WaveAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.36 of 36
HurricaneCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.36 of 36
Ice StormAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.36 of 36
Inland FloodingThe 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.36 of 36
LandslideCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.36 of 36
LightningAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.36 of 36
Strong WindAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.36 of 36
TornadoCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.36 of 36
TsunamiCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.0 of 36
Volcanic ActivityCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.0 of 36
WildfireCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.36 of 36
Winter WeatherAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.36 of 36

Source

FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-28, 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)

Supports B1-c: extent

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

HazardScaleRecordscount, yearsObserved rangeWorst recorded eventMost damaging (when different)How it applies to membersNote
Avalanchenone (count and damage)0Physical measure: in event narratives only; local data required.
Coastal Flood, Storm Surge/Tidenone in data (FIRM for depth)0Flood depth: see the FEMA Flood Insurance Rate Map.
Cold/Wind Chill, Extreme Cold/Wind Chillwind chill0Wind chill: in event narratives only; local data required.
Frost/Freeze (outside NRI Cold Wave definition)crop damage0Temperature: in event narratives only; local data required.
DroughtUS Drought Monitor D-scale8, 1999 to 2008 (8 zone-level)1 day to 152 days (median 8.5 days); 4 with a recorded value152 days (5 months), 2007-10-01 to 2008-02-29, a run of 5 consecutive Storm Events drought records, zone-levelZone-level records: applies countywide; national data do not locate these events within the county.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)0No Storm Events record; local data required (e.g., USGS).
Hailhail size (inches)151, 1962 to 20250.75 in to 4.5 in (median 1 in); 150 with a recorded value4.5 in hail, 2011-05-10; same size also recorded on 2000-05-25Hail, 2000-05-25, $30,000,000 property; crops not reported (2000 dollars)Event records naming member places: Florence city (31 records), Lake City city (16 records), Timmonsville town (9 records), Pamplico town (7 records), Scranton town (7 records), Coward town (6 records), Olanta town (6 records), Johnsonville city (3 records).
Excessive Heat, Heatheat index (narratives)4, 2011 to 2015 (4 zone-level)2 days to 13 days (median 3 days); 4 with a recorded value13 consecutive days, 2015-06-14 to 2015-06-26, zone-levelZone-level records: applies countywide; national data do not locate these events within the county.Heat index: in event narratives only; local data required.
Hurricane, Tropical Storm, Tropical DepressionSaffir-Simpson4, 2004 to 2022 (4 zone-level)Strongest recorded (records with damage, a wind speed or direct casualties first, then storm type, category and wind): Tropical Storm record, 2016-10-08 to 2016-10-14, damage not reported, 2 direct deaths (reported for the zone); NWS zone SCZ032 (FLORENCE), zone-level: may include parts of neighboring countiesZone-level records: applies countywide; national data do not locate these events within the county.Storm Events files every zone of a storm's episode under the storm's event type and category, so a Hurricane (Typhoon) record, especially an inland or remnant one, does not by itself mean hurricane-force winds here; read the damage and wind columns.
Ice StormSperry-Piltz (local data)4, 2002 to 2026 (4 zone-level)Ice Storm, 2004-01-26, $4,800,000 property; crops not reported, reported for the zone (2004 dollars); NWS zone SCZ032 (FLORENCE), zone-level: may include parts of neighboring countiesZone-level records: applies countywide; national data do not locate these events within the county.Ice thickness: in event narratives only; local data required.
Flash Flood, Flood, Lakeshore Flooddamage and flood days (FIRM for depth)57, 1996 to 2024Flood, 2015-10-04, $10,000,000 property; $0 crops (2015 dollars)Event records naming member places: Florence city (8 records), Lake City city (3 records), Pamplico town (3 records), Coward town (2 records), Olanta town (1 record), Timmonsville town (1 record).Flood depth: see the FEMA Flood Insurance Rate Map. Storm Events damage can be $0 or blank even for a major flood, so the worst record here may not be the worst flood; compare FEMA Public Assistance by declaration in B1-d.
Debris Flownone (count and damage)0Physical measure: in event narratives only; local data required.
Lightningannualized frequency (the measure FEMA's Local Mitigation Planning Handbook names)16, 1996 to 2017Lightning, 1997-09-14, damage not reported, 1 direct deathLightning, 2008-07-10, $500,000 property; crops not reported (2008 dollars)Event records naming member places: Florence city (8 records), Johnsonville city (1 record), Lake City city (1 record), Timmonsville town (1 record).Storm Events lists lightning with damage or casualties; physical measure in event narratives only; local data required.
High Wind and Strong Wind (outside NRI Strong Wind definition)wind speed (kt and mph)11, 1996 to 2023 (11 zone-level)43 kt (49 mph) to 55 kt (63 mph) (median 51 kt (59 mph)); 11 with a recorded value55 kt (63 mph), measurement type not recorded, High Wind, 1999-09-15; same speed and measurement basis also recorded on 1998-08-26, 1999-03-03; NWS zone SCZ032 (FLORENCE), zone-level: may include parts of neighboring countiesHigh Wind, 1996-09-05, $330,000 property; crops not reported, reported for the zone (1996 dollars)Zone-level records: applies countywide; national data do not locate these events within the county.
Thunderstorm Windwind speed (kt and mph)362, 1957 to 202639 kt (45 mph) to 75 kt (86 mph) (median 52 kt (60 mph)); 304 with a recorded value75 kt (86 mph) estimated gust, Thunderstorm Wind, 2007-06-05Thunderstorm Wind, 2016-07-16, $255,000 property; $0 crops (2016 dollars)Event records naming member places: Florence city (51 records), Lake City city (21 records), Johnsonville city (15 records), Scranton town (14 records), Olanta town (10 records), Pamplico town (8 records), Timmonsville town (8 records), Coward town (6 records).
TornadoEnhanced Fujita (F before Feb 2007)35, 1953 to 2020F/EF0 to F/EF2 (median F/EF1); 35 with a recorded valueF2 tornado, 1981-05-27, 4.7 mi path length (records before 1996 may include the whole path; rating and listing come from the county where the tornado began), 100 yd wide, $25,000 property; crops not recorded (1981 dollars), 6 direct injuriesTornado, 2006-05-14, $1,300,000 property; crops not reported (2006 dollars)Event records naming member places: Florence city (4 records), Lake City city (4 records), Coward town (1 record), Olanta town (1 record), Scranton town (1 record).From 1996 on, tornado records are per-county segments and length is the path length within this county (NWS Instruction 10-1605); records before 1996 may give the whole path length, including the path outside this county, and before 1996 a tornado is listed once, under the county where it began, with the whole path's rating; counties farther along the path may not list it. Length is not used to rank tornadoes.
Tsunaminone (count and damage)0Physical measure: in event narratives only; local data required.
Volcanic Ash, Volcanic AshfallVolcanic Explosivity Index (local data)0Physical measure: in event narratives only; local data required.
Wildfireacres burned (local data)0Acres burned: in event narratives only; local data required.
Winter Storm, Heavy Snow, Blizzard, Lake-Effect Snow, Winter Weather, Sleetnone in data (snowfall local)21, 2000 to 2026 (21 zone-level)Winter Weather, 2010-01-30, $10,000 property; $0 crops, reported for the zone (2010 dollars); NWS zone SCZ032 (FLORENCE), zone-level: may include parts of neighboring countiesZone-level records: applies countywide; national data do not locate these events within the county.Snow depth: in event narratives only; local data required.

Storm Events records are more complete after 1996; before 1996 only Tornado (from 1950), Hail and Thunderstorm Wind (from 1955) exist. Zone-level records are placed with NWS zone-county files, which exist from 2020 on; an earlier record is placed by its zone number in the nearest later file only when its zone name matches that file, records from zones NWS renumbered are placed by name or left out, and a record whose zone is in no known file is left out of every count, so counts before 2020 can be low. Some current zones are also missing from the NWS files, so recent counts can be low too.

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

Sources

NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

NOAA National Weather Service, NWS county-public forecast zones correlation file, version bp03mr20 to bp16ap26 (11 files; newest bp16ap26), pulled 2026-09-28, https://www.weather.gov/gis/ZoneCounty

Supports B1-d: previous occurrences

Declaration rows
28
Counted incidents
17

No approved plan on record, so there is no approval date to count from.

Federal disaster declarations for this county

DeclaredIncident beganFEMA numberTypeTitleMapped hazardCounty Public Assistancefederal share obligated, nominal dollarsFlagsNotes
2026-01-232026-01-21EM-3632-SCEmergencySEVERE WINTER STORMWinter Weathernone foundwithin last 5 years
2024-09-292024-08-04DR-4835-SCMajor disasterTROPICAL STORM DEBBYHurricane (primary); also designated: Inland Flooding, Tornado$403,404.13within last 5 years
2024-09-262024-09-25EM-3619-SCEmergencyHURRICANE HELENEHurricane (primary); also designated: Inland Flooding, Landslide, Tornadonone foundwithin last 5 years
2024-08-052024-08-04EM-3606-SCEmergencyHURRICANE DEBBYHurricane (primary); also designated: Inland Floodingnone foundwithin last 5 yearssame incident as DR-4835
2023-08-312023-08-29EM-3597-SCEmergencyHURRICANE IDALIAHurricane (primary); also designated: Inland Floodingnone foundwithin last 5 years
2022-11-212022-09-25DR-4677-SCMajor disasterHURRICANE IANHurricane$59,184.26within last 5 years
2022-09-292022-09-25EM-3585-SCEmergencyHURRICANE IANHurricanenone foundwithin last 5 yearssame incident as DR-4677
2020-03-272020-01-20DR-4492-SCMajor disasterCOVID-19 PANDEMICNon-natural, not counted$6,121.61
2020-03-132020-01-20EM-3470-SCEmergencyCOVID-19Non-natural, not countednone foundsame incident as DR-4492
2019-09-012019-08-31EM-3421-SCEmergencyHURRICANE DORIANHurricanenone found
2018-09-162018-09-08DR-4394-SCMajor disasterHURRICANE FLORENCEHurricane$506,057.94
2018-09-102018-09-08EM-3400-SCEmergencyHURRICANE FLORENCEHurricanenone foundsame incident as DR-4394
2017-10-162017-09-06DR-4346-SCMajor disasterHURRICANE IRMAHurricanenone found
2017-09-072017-09-06EM-3386-SCEmergencyHURRICANE IRMAHurricanenone foundsame incident as DR-4346
2016-10-112016-10-04DR-4286-SCMajor disasterHURRICANE MATTHEWHurricane$3,344,047.56
2016-10-062016-10-04EM-3378-SCEmergencyHURRICANE MATTHEWHurricanenone foundsame incident as DR-4286
2015-10-052015-10-01DR-4241-SCMajor disasterSEVERE STORMS AND FLOODINGInland Flooding$586,065.51
2015-10-032015-10-01EM-3373-SCEmergencySEVERE STORMS AND FLOODINGInland Floodingnone foundsame incident as DR-4241
2014-03-122014-02-10DR-4166-SCMajor disasterSEVERE WINTER STORMIce Storm$897,300.04
2014-02-122014-02-10EM-3369-SCEmergencySEVERE WINTER STORMIce Stormnone foundsame incident as DR-4166
2005-09-102005-08-29EM-3233-SCEmergencyHURRICANE KATRINA EVACUATIONHurricane: evacuation support, not a local hazard event; not counted$7,648.72
2004-10-072004-09-06DR-1566-SCMajor disasterTROPICAL STORM FRANCESHurricanePA not declared for this county
2004-02-132004-01-26DR-1509-SCMajor disasterSEVERE ICE STORMIce Storm$454,368.64
2000-01-312000-01-22DR-1313-SCMajor disasterSEVERE WINTER STORMWinter Weather$15,985.49
1999-09-211999-09-14DR-1299-SCMajor disasterHURRICANE FLOYD MAJOR DISASTER DECLARATIONSHurricane$84,106.58
1999-09-151999-09-14EM-3145-SCEmergencyHURRICANE FLOYD EMERGENCY DECLARATIONSHurricanenone foundsame incident as DR-1299
1990-10-221990-10-11DR-881-SCMajor disasterSEVERE STORMS & FLOODINGInland Floodingnone found
1989-09-221989-09-21DR-843-SCMajor disasterHURRICANE HUGOHurricanenone found

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.

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

Statewide declarations

DeclaredIncident beganFEMA numberTypeTitleMapped hazardFlagsNotes
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. Listed on every county page in the state; not counted with county rows.

Source

FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-27T010817Z, pulled 2026-09-28, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)

Previous occurrences by hazard, with explicit no-event rows

HazardStorm Events recordsfull periodSince plan approvalrecordsDuring plan reviewrecordsLast 5 yearsrecordsDeclared incidentsdistinct incidentsDeclared since approvaldistinct incidentsPeriodStatement
Avalanche0001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Coastal Flooding0001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Cold Wave0001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Drought8001996 to 2026-06-30
Earthquake000No Storm Events record; local data required (e.g., USGS).
Hail151301955 to 2026-06-30
Heat Wave4001996 to 2026-06-30
Hurricane41111996 to 2026-06-30
Ice Storm4121996 to 2026-06-30
Inland Flooding571051996 to 2026-06-30
Landslide0011996 to 2026-06-30No Storm Events records of this type; 1 federal declared incident (see declarations table)
Lightning16001996 to 2026-06-30
Strong Wind3733801955 to 2026-06-30Includes 8 High Wind records and 3 Strong Wind records, event types the NRI definition of this hazard leaves out.
Tornado35021950 to 2026-06-30
Tsunami0001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Volcanic Activity0001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Wildfire0001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Winter Weather21521996 to 2026-06-30

Sources

NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-27T010817Z, pulled 2026-09-28, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)

NOAA National Weather Service, NWS county-public forecast zones correlation file, version bp03mr20 to bp16ap26 (11 files; newest bp16ap26), pulled 2026-09-28, https://www.weather.gov/gis/ZoneCounty

Notable Storm Events records

DateEvent typeMagnitude or extentDamagenominal dollarsDirect deaths, injuriesindirect not countedLocationFlagsWhy listed
2016-10-08Flash Flood$500,000 property; $0 crops (2016 dollars)1, 0CLAUSSENdeaths or injuries recorded
2016-10-08Flash Flood$100,000 property; $0 crops (2016 dollars)1, 0KENNEDY XRDSdeaths or injuries recorded
2016-10-08Tropical Stormdamage not reported2, 0NWS zone SCZ032 (FLORENCE), zone-level: may include parts of neighboring countiesdeaths or injuries recorded
2015-10-04Flood$10,000,000 property; $0 crops (2015 dollars)0, 0NEW HOPEB1-c worst recorded: Flash Flood, Flood, Lakeshore Flood
2015-06-14Heatdamage not reported0, 0NWS zone SCZ032 (FLORENCE), zone-level: may include parts of neighboring countiesB1-c worst recorded: Excessive Heat, Heat
2011-05-10Hail4.5 in$30,000 property; $0 crops (2011 dollars)0, 0HANNAHB1-c worst recorded: Hail
2010-01-30Winter Weather$10,000 property; $0 crops, reported for the zone (2010 dollars)0, 0NWS zone SCZ032 (FLORENCE), zone-level: may include parts of neighboring countiesB1-c worst recorded: Winter Storm, Heavy Snow, Blizzard, Lake-Effect Snow, Winter Weather, Sleet
2007-06-05Thunderstorm Wind75 kt (86 mph) estimated gust$100,000 property; crops not reported (2007 dollars)0, 0LAKE CITYB1-c worst recorded: Thunderstorm Wind
2004-01-26Ice Storm$4,800,000 property; crops not reported, reported for the zone (2004 dollars)0, 0NWS zone SCZ032 (FLORENCE), zone-level: may include parts of neighboring countiesB1-c worst recorded: Ice Storm
1999-09-15High Wind55 kt (63 mph), measurement type not recordeddamage not reported0, 0NWS zone SCZ032 (FLORENCE), zone-level: may include parts of neighboring countiesB1-c worst recorded: High Wind and Strong Wind (outside NRI Strong Wind definition)
1997-09-14Lightningdamage not reported1, 0FLORENCEB1-c worst recorded: Lightning
1981-05-27TornadoF2, 4.7 mi path length (records before 1996 may include the whole path; rating and listing come from the county where the tornado began), 100 yd wide$25,000 property; crops not recorded (1981 dollars)0, 6location not recordedB1-c worst recorded: Tornado

The full list is in the XLSX file, sheet "B1-d Storm Events history" (673 rows).

Storm Events records are more complete after 1996; before 1996 only Tornado (from 1950), Hail and Thunderstorm Wind (from 1955) exist. Zone-level records are placed with NWS zone-county files, which exist from 2020 on; an earlier record is placed by its zone number in the nearest later file only when its zone name matches that file, records from zones NWS renumbered are placed by name or left out, and a record whose zone is in no known file is left out of every count, so counts before 2020 can be low. Some current zones are also missing from the NWS files, so recent counts can be low too.

Sources

NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

NOAA National Weather Service, NWS county-public forecast zones correlation file, version bp03mr20 to bp16ap26 (11 files; newest bp16ap26), pulled 2026-09-28, https://www.weather.gov/gis/ZoneCounty

FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-26T121003Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)

State-declared emergencies are not in federal data. Add them from your state emergency management agency.

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

Supports B1-e: probability

Probability: FEMA annualized frequency and descriptor per hazard

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
Avalancheevents per year1994 to 2023 (30 years)see B1-fNot Applicable in NRI for this county; no descriptor.
Coastal Flooding0events per year at a location (modeled)none modeledStorm Events records in 0 of 30 years, 1996 to 2025 (0%)not shownmodeledsee B1-fNo Storm Events record of this hazard, 1996 to 2025; descriptor not assigned (the NRI value is the chance at a location in the county, not how often the hazard affects the county)
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 recorded event-days, 1996 to 2025; descriptor not assigned. Frost/Freeze records are not counted in this descriptor: they record crop freezes, not cold waves.
Drought15.1event-days per yearabout 15.1 days per yearLikelyevent-days in 5 of 30 years, 1996 to 2025 (16.7%)4482000 to 2025 (25.25 years; D3 and D4 only)countywideNRI gives about 15.1 drought event-days a year here (its annualized frequency over 25.25 years; not its event count divided by the years), but Storm Events has a record in only 5 of 30 years. NRI counts from a different source that records far more events than Storm Events, so this descriptor reads much lower than NRI's frequency; read the two together.
Earthquake0.00303annual probability at a locationchance a given location in the county has at least minor-damage shaking in a year: 0.303%not shownmodeledsee B1-fDescriptor not assigned: the NRI value is the chance at a location in the county, not how often the hazard affects the county, and Storm Events does not record earthquakes.
Hail3.32events per yearabout 3.32 per yearHighly likelyFEMA annualized frequency (modeled)126.2 (modeled)1986 to 2023 (38 years)countywide
Heat Wave8.95event-days per yearabout 8.95 days per yearLikelyevent-days in 3 of 30 years, 1996 to 2025 (10%)1472005-11-12 to 2024-11-12 (19 years)countywideNRI gives about 8.95 heat wave event-days a year here (its annualized frequency over 19 years; not its event count divided by the years), but Storm Events has a record in only 3 of 30 years. NRI counts from a different source that records far more events than Storm Events, so this descriptor reads much lower than NRI's frequency; read the two together.
Hurricane0.258events per yearabout 1 in 4 yearsLikelyFEMA annualized frequency (modeled)861851 to 2024 (Atlantic)see B1-fNRI counts hurricane and tropical storm tracks passing within storm-force wind range; federal declarations are counted separately in B1-d and need not match.
Ice Storm0.789event-days per yearabout 0.789 days per yearLikelyevent-days in 3 of 30 years, 1996 to 2025 (10%)531946-12-31 to 2014-02-12 (67 years)countywide
Inland Flooding0.786event-days per yearabout 0.786 days per yearLikelyevent-days in 14 of 30 years, 1996 to 2025 (46.7%)221996 to 2023 (28 years)see B1-f
Landslide0.171events per year (modeled)about 1 in 6 yearsLikelyFEMA annualized frequency (modeled)not shownmodeledsee B1-f
Lightning58.2days per year with a strikeabout 58.2 days per yearHighly likelyFEMA annualized frequency (modeled)not shown1995 to 2023 (29 years; CONUS)countywide
Strong Wind4.09events per yearabout 4.09 per yearHighly likelyFEMA annualized frequency (modeled)1561986 to 2023 (38 years)countywide
Tornado0.448events per yearabout 1 in 2 yearsLikelyFEMA annualized frequency (modeled)not shown1950 to 2023 (EF2+); 1986 to 2023 (EF0-1)see B1-f
Tsunamiannual probability at the most exposed location (used in place of a county value)not shownmodeledsee B1-fNot Applicable in NRI for this county; no descriptor.
Volcanic Activityannual probabilitynot shownmodeledsee B1-fNot Applicable in NRI for this county; no descriptor.
Wildfire0.00188annual probability at a locationchance a given location in the county burns in a year: 0.188%Storm Events records in 0 of 30 years, 1996 to 2025 (0%)not shownmodeledsee B1-fNo Storm Events record of this hazard, 1996 to 2025; descriptor not assigned (the NRI value is the chance at a location in the county, not how often the hazard affects the county)
Winter Weather1.58event-days per yearabout 1.58 days per yearLikelyevent-days in 12 of 30 years, 1996 to 2025 (40%)302005-11-12 to 2024-11-12 (19 years)countywideNRI gives about 1.58 winter weather event-days a year here (its annualized frequency over 19 years; not its event count divided by the years), but Storm Events has a record in only 12 of 30 years. NRI counts from a different source that records far more events than Storm Events, so this descriptor reads much lower than NRI's frequency; read the two together.

FEMA annualized frequency (modeled) comes from the National Risk Index v1.20 (December 2025). It is not recorded events divided by years, and what it measures depends on the hazard. For most hazards it estimates how often the hazard affects this county each year: it counts events or event-days (drought, heat wave, cold wave, winter weather, ice storm and inland flooding are in days per year; lightning is the number of days per year with a recorded cloud-to-ground strike, from the NOAA Storm Prediction Center daily lightning climatology); it may count events in the surrounding area (hail, strong wind, tornado, hurricane and ice storm use a 49 km grid and buffers) and is averaged over the county's area; and some hazards use a minimum value for places with no recorded event. Earthquake, wildfire and coastal flooding are different: FEMA computes them for each census block and averages them over the county, so the value is the chance (for coastal flooding, the modeled number of floods per year) at a location in the county, which is lower than the chance that the hazard strikes somewhere in the county. Earthquake is the chance of at least minor-damage shaking (U.S. Geological Survey model); wildfire is the chance that a location burns in a large fire (U.S. Forest Service burn probability); coastal flooding comes from FEMA flood zones and NOAA high-tide flooding, so it can be above 1 where high-tide flooding is frequent. Tsunami is the value at the county's most exposed location, from recorded events and modeled return periods. For these four hazards the packet gives no "1 in N years" and takes the descriptor from Storm Events (none for earthquake) unless the value is 1 or more a year. Landslide is a U.S. Geological Survey modeled county rate spread by slope susceptibility. Volcanic activity is the chance that a volcano affecting the county erupts in a year. Drought counts only extreme and exceptional drought (D3 and D4). Source: FEMA, National Risk Index Technical Documentation v1.20, sections 5.2.2 (Table 5), 5.2.3, 7.4, 10.4, 16.5, 17.1, 17.3.1, 17.5, 20.3.1, 21.4, 22.4 and 6 to 23.

Sources

FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-28, 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)

NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

Descriptor scale used in this packet (defined per unit)

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

Sources

FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-28, 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)

NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

Intensity bands: historical frequency (Storm Events)

HazardBandYearsEventscounty-coded recordsYears in periodEvents per yearevents / years
Hail1.00-1.99 in1996 to 202563302.1
Hail2.00 in+1996 to 20255300.167
Strong Wind (Thunderstorm Wind records)50-64 kt1996 to 2025254308.47
Strong Wind (Thunderstorm Wind records)65 kt+1996 to 202530301
Strong Wind (Thunderstorm Wind records)unmeasured or below 50 kt1996 to 20253300.1
TornadoEF0-11996 to 202515300.5
TornadoEF2-31996 to 20251300.0333
TornadoEF4-51996 to 20250300
Tornadounrated (EFU)1996 to 20250300

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.

Source

NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

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.

Supports B1-f: variation across the planning area

Range of census tract risk within the county

HazardTractsrated of allRisk score minNRI score, 0 to 100MedianMaxTracts by ratingNote
Avalanche0 of 36Not Applicable 36
Coastal Flooding0 of 36No Rating 36
Cold Wave36 of 3615.748.671.1Relatively Moderate 22, Relatively Low 13, Very Low 1National data give a county-wide or coarse (49 km grid or NWS zone) frequency for this hazard, so they cannot show members' hazard differing. The tract range above mostly reflects where buildings and people are. Confirm locally.
Drought34 of 3668.681.689.4Relatively Low 22, Very Low 12, No Rating 2National data give a county-wide or coarse (49 km grid or NWS zone) frequency for this hazard, so they cannot show members' hazard differing. Agriculture is all of NRI's expected annual loss for this hazard in the county, so the tract range above mostly reflects where crop and livestock value is, not where buildings and people are. Confirm locally.
Earthquake36 of 3624.280.187.0Relatively Moderate 22, Relatively Low 13, Very Low 1
Hail36 of 3628.181.790.1Relatively High 2, Relatively Moderate 32, Relatively Low 1, Very Low 1National data give a county-wide or coarse (49 km grid or NWS zone) frequency for this hazard, so they cannot show members' hazard differing. The tract range above mostly reflects where buildings and people are. Confirm locally.
Heat Wave36 of 361.575.892.1Relatively High 4, Relatively Moderate 29, Relatively Low 2, Very Low 1National data give a county-wide or coarse (49 km grid or NWS zone) frequency for this hazard, so they cannot show members' hazard differing. The tract range above mostly reflects where buildings and people are. Confirm locally.
Hurricane36 of 3660.592.696.2Relatively High 28, Relatively Moderate 7, Relatively Low 1
Ice Storm36 of 368.182.891.8Relatively High 2, Relatively Moderate 28, Relatively Low 5, Very Low 1National data give a county-wide or coarse (49 km grid or NWS zone) frequency for this hazard, so they cannot show members' hazard differing. The tract range above mostly reflects where buildings and people are. Confirm locally.
Inland Flooding36 of 360.443.484.1Relatively High 2, Relatively Moderate 14, Relatively Low 16, Very Low 4
Landslide36 of 3610.755.983.4Relatively Low 1, Very Low 35
Lightning36 of 360.572.593.5Relatively High 12, Relatively Moderate 21, Relatively Low 2, Very Low 1National data give a county-wide or coarse (49 km grid or NWS zone) frequency for this hazard, so they cannot show members' hazard differing. The tract range above mostly reflects where buildings and people are. Confirm locally.
Strong Wind36 of 363.363.881.0Relatively Moderate 26, Relatively Low 9, Very Low 1National data give a county-wide or coarse (49 km grid or NWS zone) frequency for this hazard, so they cannot show members' hazard differing. The tract range above mostly reflects where buildings and people are. Confirm locally.
Tornado36 of 3610.083.396.9Very High 4, Relatively High 25, Relatively Moderate 6, Very Low 1
Tsunami0 of 36Not Applicable 36
Volcanic Activity0 of 36Not Applicable 36
Wildfire36 of 3621.987.394.1Relatively Moderate 13, Relatively Low 18, Very Low 5
Winter Weather36 of 3611.363.983.9Relatively High 4, Relatively Moderate 29, Relatively Low 2, Very Low 1National data give a county-wide or coarse (49 km grid or NWS zone) frequency for this hazard, so they cannot show members' hazard differing. The tract range above mostly reflects where buildings and people are. Confirm locally.

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.

Source

FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-28, 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)

Per-member block (Starter, confirm locally)

MemberTypePlan statusRepetitive lossFMA RL and SRL (44 CFR 77.2); repeat-flood, any definitionPublic Assistance matchedfederal share obligated, nominal dollarsEvent records naming this placeall years; since the member's planNotes
Florence County (unincorporated area)UnincorporatedNo approved plan on recordFMA RL 6, SRL 4; any 41$2,597,885.990; no approved planIncludes $7,648.72 for declarations not counted as hazard incidents (EM-3233-SC).
Coward townTownNo approved plan on recordFMA RL 0, SRL 0; any 0$12,609.3115; no approved plan
Florence cityTownNo approved plan on recordFMA RL 0, SRL 0; any 9$3,142,308.23102; no approved planIncludes $6,121.61 for declarations not counted as hazard incidents (DR-4492-SC).
Johnsonville cityTownNo approved plan on recordFMA RL 0, SRL 0; any 0$123,856.6019; no approved plan
Lake City cityCityNo approved plan on recordFMA RL 0, SRL 0; any 1$10,489.3845; no approved plan
Olanta townTownNo approved plan on recordFMA RL 0, SRL 0; any 0$5,895.2918; no approved plan
Pamplico townTownNo approved plan on recordFMA RL 0, SRL 0; any 0$74,251.0418; no approved plan
Quinby townTownNo approved plan on recordFMA RL 0, SRL 0; any 0none found0; no approved plan
Scranton townTownNo approved plan on recordFMA RL 0, SRL 0; any 0$45,803.8822; no approved plan
Timmonsville townTownNo approved plan on recordFMA RL 0, SRL 0; any 0$41,474.0819; no approved plan

Member 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 member row, while the county table counts only its part in this county.

School districts and special districts get a plan clock row only.

Sources

FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-26T121003Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)

FEMA, OpenFEMA NfipMultipleLossProperties v1, version 2026-08-04T164045Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/NfipMultipleLossProperties (API)

FEMA, OpenFEMA PublicAssistanceFundedProjectsSummaries v1, version 2026-09-26T151157Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/PublicAssistanceFundedProjectsSummaries (API)

NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

Supports B2-a and B2-b: assets and impacts

Local data required

County-level starter. The plan must describe impacts for each participant and its own assets.

No approved plan on record, so there is no approval date to count from.

  • Critical facilities and lifelines per hazard
  • A problem statement per participant 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

HazardBuilding exposuremodeled dollarsAgriculture exposuremodeled dollarsPopulation exposedpeopleEAL buildingsmodeled dollars per yearEAL agriculturemodeled dollars per yearEAL population equivalencestatistical value of life and injury, $13.7M per life, not property damageEAL as % of exposurebuildings; agriculture where notedStorm Events damage since plancounty-coded records, property plus crops, nominal dollarsZone-level damage since planproperty plus crops, reported for the zonePublic Assistance since plannominal dollars; see noteNote
AvalancheNot Applicable in NRI for this county
Coastal Flooding$00$0$0building exposure is 0 in NRI
Cold Wave$29,302,097,654$58,275,647136,859$9,721$21,485$1,575,727under 0.0001%
Drought$51,388,461$108,8120.212% (agriculture)NRI has no building exposure for this hazard; agriculture shown
Earthquake$51,818,440,559137,059$4,572,224$2,101,7490.00882%
Hail$29,302,097,654$58,275,647136,859$1,326,995$5,085$194,9830.00453%
Heat Wave$29,302,097,654$58,275,647136,859$177$142$2,909,323under 0.0001%
Hurricane$29,299,408,458$58,275,647136,844$21,284,202$489,194$1,011,5340.0726%
Ice Storm$29,301,709,657136,859$501,275$95,2770.00171%
Inland Flooding$29,289,356,549$1,285,1711,696$16,669,755$14,471$891,714n/a (see note)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. EAL as % of exposure: n/a.
Landslide$52,574,074203$492$40.000936%
Lightning$29,302,097,654136,859$54,467$715,6110.000186%
Strong Wind$29,302,097,654$58,275,647136,859$163,275$64,367$641,7830.000557%
Tornado$29,302,097,654$58,275,647136,859$3,333,599$1,727$5,602,9900.0114%
TsunamiNot Applicable in NRI for this county
Volcanic ActivityNot Applicable in NRI for this county
Wildfire$3,728,076,860$26,567,03437,923$555,180$363$100,5840.0149%
Winter Weather$29,302,097,654$58,275,647136,859$6,574$15$145,737under 0.0001%

Totals since the plan: not available. No approved plan on record, so there is no approval date to count from.

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

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 must not be added up; the unit total counts each declaration once.

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

Sources

FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-28, 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)

NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-28, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/

NOAA National Weather Service, NWS county-public forecast zones correlation file, version bp03mr20 to bp16ap26 (11 files; newest bp16ap26), pulled 2026-09-28, https://www.weather.gov/gis/ZoneCounty

FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-27T010817Z, pulled 2026-09-28, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)

FEMA, OpenFEMA PublicAssistanceFundedProjectsSummaries v1, version 2026-09-26T151157Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/PublicAssistanceFundedProjectsSummaries (API)

FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-26T121003Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)

Supports B2-a: context

County context

MeasureValue
Population136,859
Building value (total, not at risk)$29,302,097,654
Agriculture value (total, not at risk)$58,275,647
NRI risk rating (all hazards)Relatively Moderate
Expected annual loss, buildings and agriculture, all hazards$49,183,596
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)$15,987,014
Social vulnerability ratingRelatively High
Community resilience ratingRelatively High
NRI versionDecember 2025

FEMA's all-hazard expected annual loss total adds buildings, agriculture and population equivalence; the two parts are shown separately so the property figure is not read as including the statistical value of life.

Source

FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-28, 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)

Supports B2-c: repetitive loss

Repetitive loss in this county, both definitions

DefinitionPropertiesSevere repetitive lossProperties
Repetitive loss, FMA definition (44 CFR 77.2)6Severe repetitive loss, FMA definition (44 CFR 77.2)4
Repetitive loss, NFIP insurance definition50Severe repetitive loss, NFIP insurance definition4

Your state NFIP coordinator's list may use the NFIP insurance definition, so its counts can be higher.

Repeat-flood properties: county and state-level rows

ScopeRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredproperties
County total6450451119
FLORENCE COUNTY *6440441114
FLORENCE, CITY OF0090904
LAKE CITY, CITY OF0010101
State level, not in this county: county not reported0020200

Repeat-flood properties by plan member (NFIP community)

MemberNFIP community IDRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredpropertiesNote
Florence County (unincorporated area)4500766440441114
Coward town4500770000000
Florence city4500780090904
Johnsonville city4502080000000
Lake City city4500790010101
Olanta town4500800000000
Pamplico town4500810000000
Quinby town4500820000000
Scranton town4500830000000
Timmonsville town4500840000000

Per-member types: XLSX sheet 'B2-c Members'.

Member 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 member row, while the county table counts only its part in this county.

County repeat-flood properties by occupancy group

Occupancy groupRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredproperties
single-family residential6449450119
2 to 4 unit residential0000000
other residential0000000
non-residential0010100
not reported0000000

Institutional properties cannot be separated in this data: FEMA's occupancy groups have no institutional class, so they fall 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; OpenFEMA's fmaRl field description omits the Increased Cost of Compliance clause of 44 CFR 77.2(i). NFIP repetitive loss (FEMA insurance definition, nfipRl) is 2 or more claims over $1,000 in 10 years and can drop to false when a property is mitigated. Also shown: NFIP severe repetitive loss, any category, mitigated and currently insured.

Your state NFIP coordinator's list may use the NFIP insurance definition, so its counts can be higher.

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

Counts may differ from your state NFIP coordinator's list, which is the source the Handbook names.

In this county 1 property is FMA repetitive loss but not NFIP repetitive loss, and 45 properties are NFIP repetitive loss but not FMA repetitive loss.

Exact counts; no count suppression.

Sources

Every table above lists its own sources. The full list, for the plan's bibliography (FEMA review item A4-a):

  1. FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-26T121003Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)
  2. FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-27T010817Z, pulled 2026-09-28, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)
  3. FEMA, OpenFEMA PublicAssistanceFundedProjectsSummaries v1, version 2026-09-26T151157Z, pulled 2026-09-28, https://www.fema.gov/api/open/v1/PublicAssistanceFundedProjectsSummaries (API)
  4. FEMA, OpenFEMA NfipMultipleLossProperties v1, version 2026-08-04T164045Z, pulled 2026-09-28, 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 2026-09-28, 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 2026-09-28, 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 2026-09-28, 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 2026-09-28, 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

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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).

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.

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). Florence County, SC: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-28; County area 45041). Preview: automated baseline. 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: to be added

Hazard Plain release 2026-10. As of 2026-09-28; Storm Events data through 2026-06-30. File hazard-plain_2026-10_SC_45041. Preview: automated baseline.