Hazard Plain Preview: automated baseline

Onslow County, NC

Risk-assessment baseline packet

Unit
County area 37133
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
Approved, expires 2031-04-20
Plan
Southeastern NC Regional (FEMA plan 111751)
Approved
2026-04-21
Expires
2031-04-20
As of
2026-09-28
Days
1,665 days to expiry

What changed since your last plan (approved 2026-04-21)

New federal declarations
none (0 declaration rows; 0 counted incidents)
Storm Events records since approval
4 (data through 2026-06-30)
Repetitive loss now
FMA RL 21, SRL 78 (44 CFR 77.2); any definition: 497
Repeat-flood change
First release: no prior release to compare.

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
Onslow CountyCountyApproved, expires 2031-04-20Southeastern NC Regional (FEMA plan 111751)2026-04-212031-04-201,665member approved 2026-05-01
Holly Ridge townTownApproved, expires 2031-04-20Southeastern NC Regional (FEMA plan 111751)2026-04-212031-04-201,665member approved 2026-05-26
Jacksonville cityCityApproved, expires 2031-04-20Southeastern NC Regional (FEMA plan 111751)2026-04-212031-04-201,665member approved 2026-05-01
North Topsail Beach townTownApproved, expires 2031-04-20Southeastern NC Regional (FEMA plan 111751)2026-04-212031-04-201,665member approved 2026-05-01
Richlands townTownApproved, expires 2031-04-20Southeastern NC Regional (FEMA plan 111751)2026-04-212031-04-201,665member approved 2026-05-01
Swansboro townTownApproved, expires 2031-04-20Southeastern NC Regional (FEMA plan 111751)2026-04-212031-04-201,665member approved 2026-05-01
Onslow Water and Sewer AuthorityWater/Sewer AuthorityApproved, expires 2031-04-20Southeastern NC Regional (FEMA plan 111751)2026-04-212031-04-201,665member approved 2026-09-21

Plan 111751 lists 34 other participants not on this page, 2 of them not covered by it yet (named in the XLSX file).

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
1HurricaneVery HighVery High$157,476,825$3,644,832$9,491,734$170,613,3914
2Inland FloodingRelatively ModerateRelatively Moderate$22,122,799$101,600$552,427$22,776,82560
3TornadoRelatively ModerateRelatively Moderate$1,505,554$4,337$5,356,572$6,866,46429
4Heat WaveRelatively ModerateRelatively Moderate$195$516$3,109,125$3,109,8369
5Coastal FloodingRelatively ModerateRelatively High$2,624,821$195,621$2,820,4431
6Winter WeatherVery HighVery High$181,764$305$1,609,852$1,791,9214
7Cold WaveRelatively LowRelatively Moderate$9,980$72,395$1,696,629$1,779,0050No recorded events in Storm Events since 1996 (data through 2026-06-30).
8LightningRelatively HighRelatively High$151,393$1,625,743$1,777,1356
9Strong WindRelatively ModerateRelatively High$454,616$152,888$1,070,602$1,678,105178Includes 1 High Wind record, event types the NRI definition of this hazard leaves out.
10WildfireRelatively LowRelatively Moderate$836,671$1,493$129,742$967,9060No 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.
11EarthquakeRelatively LowRelatively Low$649,756$183,943$833,699Not in Storm Events. Storm Events coverage of this hazard is limited; absence is not evidence of low risk.
12Ice StormRelatively ModerateRelatively Moderate$334,943$59,176$394,1191
13HailRelatively LowRelatively Low$84,294$28,044$153,703$266,042174
14DroughtRelatively LowRelatively Low$48,183$48,18313
15LandslideVery LowVery Low$734$8$7420Declared 1 time; no Storm Events record of this type. Storm Events coverage of this hazard is limited; absence is not evidence of low risk.
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).
TsunamiInsufficient DataInsufficient Data0No 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 45
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.42 of 45
Cold WaveAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.45 of 45
DroughtAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.39 of 45
EarthquakeCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.45 of 45
HailAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.45 of 45
Heat WaveAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.45 of 45
HurricaneCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.45 of 45
Ice StormAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.45 of 45
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.45 of 45
LandslideCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.45 of 45
LightningAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.45 of 45
Strong WindAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.45 of 45
TornadoCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.45 of 45
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 45
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 45
WildfireCensus tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.45 of 45
Winter WeatherAffects the whole planning area; national data do not distinguish locations within the county. Confirm locally.45 of 45

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)1, 2021 to 2021 (1 zone-level)No damage reported in 1 records.Zone-level records: applies countywide; national data do not locate these events within the county.Flood 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-scale13, 2022 to 2026 (13 zone-level)7 days to 108 days (median 79 days); 4 with a recorded value108 days (about 3.5 months), 2022-03-15 to 2022-06-30, a run of 4 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)193, 1974 to 20250.75 in to 2.75 in (median 0.88 in); 193 with a recorded value2.75 in hail, 1997-04-21Event records naming member places: Jacksonville city (21 records), Richlands town (11 records), Swansboro town (11 records), Holly Ridge town (3 records), North Topsail Beach town (1 record).
Excessive Heat, Heatheat index (narratives)9, 2019 to 2025 (9 zone-level)1 day to 3 days (median 2 days); 7 with a recorded value3 consecutive days, 2025-07-26 to 2025-07-28, 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, 2019 to 2024 (4 zone-level)Strongest recorded (records with damage, a wind speed or direct casualties first, then storm type, category and wind): Tropical Storm record, 2022-09-30, $0 property; $0 crops, reported for the zone (2022 dollars); NWS zone NCZ198 (INLAND ONSLOW), 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)1, 2022 to 2022 (1 zone-level)No damage reported in 1 records.Zone-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)60, 1996 to 2025Flash Flood, 2010-09-30, $1,000,000 property; $6,000,000 crops (2010 dollars)Event records naming member places: Jacksonville city (9 records), Richlands town (4 records), Swansboro town (2 records), Holly Ridge town (1 record), North Topsail Beach 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)6, 1996 to 2025Lightning, 2025-04-11, $0 property; $0 crops (2025 dollars), 1 direct death, 1 direct injuryLightning, 1996-08-01, $2,000,000 property; crops not reported (1996 dollars)Event records naming member places: Jacksonville city (1 record), Swansboro 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)1, 2022 to 2022 (1 zone-level)50 kt (58 mph); 1 with a recorded value50 kt (58 mph) estimated gust, High Wind, 2022-03-12; NWS zone NCZ198 (INLAND ONSLOW), zone-level: may include parts of neighboring countiesZone-level records: applies countywide; national data do not locate these events within the county.
Thunderstorm Windwind speed (kt and mph)231, 1964 to 202650 kt (58 mph) to 78 kt (90 mph) (median 50 kt (58 mph)); 183 with a recorded value78 kt (90 mph), measurement type not recorded, Thunderstorm Wind, 1983-03-21Thunderstorm Wind, 2006-05-26, $50,000 property; crops not reported (2006 dollars)Event records naming member places: Jacksonville city (17 records), Swansboro town (11 records), Richlands town (10 records), Holly Ridge town (3 records), North Topsail Beach town (3 records).
TornadoEnhanced Fujita (F before Feb 2007)50, 1955 to 2026F/EF0 to F/EF3 (median F/EF0); 50 with a recorded valueEF3 tornado, 2011-04-16, 3.76 mi within this county, 450 yd wide, $9,400,000 property; $0 crops (2011 dollars), 30 direct injuriesEvent records naming member places: Jacksonville city (8 records), Richlands town (4 records), Swansboro 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)4, 2025 to 2026 (4 zone-level)No damage reported in 4 records.Zone-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
30
Counted incidents
20

Federal disaster declarations for this county

DeclaredIncident beganFEMA numberTypeTitleMapped hazardCounty Public Assistancefederal share obligated, nominal dollarsFlagsNotes
2026-01-242026-01-21EM-3637-NCEmergencySEVERE WINTER STORMWinter Weathernone foundduring plan review, check whether your last plan included it; within last 5 years
2024-10-192024-09-16DR-4837-NCMajor disasterPOTENTIAL TROPICAL CYCLONE EIGHTHurricane (primary); also designated: Inland Flooding$3,482,974.18within last 5 years
2024-09-262024-09-25EM-3617-NCEmergencyHURRICANE HELENEHurricane (primary); also designated: Inland Flooding, Landslidenone foundwithin last 5 years
2024-08-062024-08-05EM-3608-NCEmergencyTROPICAL STORM DEBBYHurricanenone foundwithin last 5 years
2022-10-012022-09-28EM-3586-NCEmergencyHURRICANE IANHurricane$39,436.62within last 5 years
2020-10-142020-07-31DR-4568-NCMajor disasterHURRICANE ISAIASHurricane$1,404,258.49
2020-08-022020-07-31EM-3534-NCEmergencyHURRICANE ISAIASHurricanenone foundsame incident as DR-4568
2020-03-252020-01-20DR-4487-NCMajor disasterCOVID-19 PANDEMICNon-natural, not counted$1,177,196.74
2020-03-132020-01-20EM-3471-NCEmergencyCOVID-19Non-natural, not countednone foundsame incident as DR-4487
2019-10-042019-09-01DR-4465-NCMajor disasterHURRICANE DORIANHurricane$2,212,188.92
2019-09-032019-09-01EM-3423-NCEmergencyHURRICANE DORIANHurricanenone foundsame incident as DR-4465
2018-09-142018-09-07DR-4393-NCMajor disasterHURRICANE FLORENCEHurricane$57,167,753.97
2018-09-102018-09-07EM-3401-NCEmergencyHURRICANE FLORENCEHurricanenone foundsame incident as DR-4393
2016-10-102016-10-04DR-4285-NCMajor disasterHURRICANE MATTHEWHurricane$6,487,394.07
2016-10-072016-10-04EM-3380-NCEmergencyHURRICANE MATTHEWHurricanenone foundsame incident as DR-4285
2011-08-312011-08-25DR-4019-NCMajor disasterHURRICANE IRENEHurricane$3,119,259.92
2011-08-252011-08-25EM-3327-NCEmergencyHURRICANE IRENEHurricanenone foundsame incident as DR-4019
2011-04-192011-04-16DR-1969-NCMajor disasterSEVERE STORMS, TORNADOES, AND FLOODINGInland Flooding; Tornado$384,542.07
2010-10-142010-09-27DR-1942-NCMajor disasterSEVERE STORMS, FLOODING, AND STRAIGHT-LINE WINDSInland Flooding; Strong WindPA not declared for this county
2010-09-012010-09-01EM-3314-NCEmergencyHURRICANE EARLHurricane$12,850.35
2005-10-072005-09-11DR-1608-NCMajor disasterHURRICANE OPHELIAHurricane$495,293.43
2005-09-142005-09-11EM-3254-NCEmergencyHURRICANE OPHELIAHurricane$1,258,821.46same incident as DR-1608
2005-09-052005-08-29EM-3222-NCEmergencyHURRICANE KATRINA EVACUATIONHurricane: evacuation support, not a local hazard event; not countednone found
2003-09-182003-09-18DR-1490-NCMajor disasterHURRICANE ISABELHurricane$597,198.24
1999-09-161999-09-15DR-1292-NCMajor disasterHURRICANE FLOYD MAJOR DISASTER DECLARATIONSHurricane$7,128,519.83
1999-09-151999-09-15EM-3146-NCEmergencyHURRICANE FLOYD EMERGENCY DECLARATIONSHurricanenone foundsame incident as DR-1292
1999-09-011999-08-29EM-3141-NCEmergencyHURRICANE DENNISHurricane$86,009.04
1998-08-271998-08-20DR-1240-NCMajor disasterHURRICANE BONNIEHurricanenone found
1996-09-061996-09-05DR-1134-NCMajor disasterHURRICANE FRANHurricanenone found
1996-07-181996-07-10DR-1127-NCMajor disasterHURRICANE BERTHAHurricanenone 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
1964-10-131964-10-13DR-179-NCMajor disasterSEVERE STORMS & FLOODINGInland Flooding
1962-03-161962-03-16DR-130-NCMajor disasterSEVERE STORM, HIGH TIDES & FLOODINGInland Flooding (primary); also designated: Coastal Flooding
1960-09-161960-09-16DR-107-NCMajor disasterHURRICANE DONNAHurricane (primary); also designated: Inland Flooding
1958-10-011958-10-01DR-87-NCMajor disasterHURRICANE & SEVERE STORMHurricane
1956-04-241956-04-24DR-56-NCMajor disasterSEVERE STORMHazard not mapped (severe storm title names no single hazard); not counted
1955-08-131955-08-13DR-37-NCMajor disasterHURRICANESHurricane (primary); also designated: Inland Flooding
1954-10-171954-10-17DR-28-NCMajor 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.

1 Fire Management declaration (1986-05-10 to 1986-05-10) FEMA filed as Statewide with no county; each names one local fire. Listed on the state page.

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
Avalanche0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Coastal Flooding1001001996 to 2026-06-30
Cold Wave0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Drought132513001996 to 2026-06-30
Earthquake000000No Storm Events record; local data required (e.g., USGS).
Hail193039001955 to 2026-06-30
Heat Wave9025001996 to 2026-06-30
Hurricane40021701996 to 2026-06-30
Ice Storm1001001996 to 2026-06-30
Inland Flooding600717401996 to 2026-06-30
Landslide0000101996 to 2026-06-30No Storm Events records of this type; 1 federal declared incident (see declarations table)
Lightning6001001996 to 2026-06-30
Strong Wind2322549101955 to 2026-06-30Includes 1 High Wind record, event types the NRI definition of this hazard leaves out.
Tornado50024101950 to 2026-06-30
Tsunami0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Volcanic Activity0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Wildfire0000001996 to 2026-06-30No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events
Winter Weather4024101996 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
2025-07-26Excessive Heatdamage not reported0, 0NWS zone NCZ199 (COASTAL ONSLOW), zone-level: may include parts of neighboring countiesduring plan review, check whether your last plan included it; within last 5 yearsB1-c worst recorded: Excessive Heat, Heat
2025-04-11Lightning$0 property; $0 crops (2025 dollars)1, 1MIDWAY PARKwithin last 5 yearsdeaths or injuries recorded
2022-09-30Tropical Storm$0 property; $0 crops, reported for the zone (2022 dollars)0, 0NWS zone NCZ198 (INLAND ONSLOW), zone-level: may include parts of neighboring countieswithin last 5 yearsB1-c worst recorded: Hurricane, Tropical Storm, Tropical Depression
2022-03-15Droughtdamage not reported0, 0NWS zone NCZ199 (COASTAL ONSLOW), zone-level: may include parts of neighboring countieswithin last 5 yearsB1-c worst recorded: Drought
2022-03-12High Wind50 kt (58 mph) estimated gustdamage not reported0, 0NWS zone NCZ198 (INLAND ONSLOW), zone-level: may include parts of neighboring countieswithin last 5 yearsB1-c worst recorded: High Wind and Strong Wind (outside NRI Strong Wind definition)
2017-07-11Lightning$0 property; $0 crops (2017 dollars)1, 1(NCA)MCAS NEW RIVERdeaths or injuries recorded
2011-04-16TornadoEF3, 3.76 mi within this county, 450 yd wide$9,400,000 property; $0 crops (2011 dollars)0, 30MIDWAY PARKB1-c worst recorded: Tornado
2010-09-30Flash Flood$1,000,000 property; $6,000,000 crops (2010 dollars)0, 0CATHERINE LAKE to MORRIS LNDGB1-c worst recorded: Flash Flood, Flood, Lakeshore Flood
1997-04-21Hail2.75 indamage not reported0, 0DEPPEB1-c worst recorded: Hail
1996-08-01Lightning$2,000,000 property; crops not reported (1996 dollars)0, 0JACKSONVILLEB1-c most damaging: Lightning
1986-07-02TornadoF2, 1.5 mi path length (records before 1996 may include the whole path; rating and listing come from the county where the tornado began), 33 yd wide$250,000 property; crops not recorded (1986 dollars)3, 10location not recordeddeaths or injuries recorded
1983-03-21Thunderstorm Wind78 kt (90 mph), measurement type not recordeddamage not recorded (pre-1996 record)0, 0location not recordedB1-c worst recorded: Thunderstorm Wind

The full list is in the XLSX file, sheet "B1-d Storm Events history" (573 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 Flooding3.26events per year at a location (modeled)about 3.3 per year at a given location in the countyHighly likelyFEMA annualized frequency (modeled)not shownmodeledsee B1-fDescriptor from NRI: the rate at a location is 1 or more a year, so the county rate is at least that.
Cold Wave0.421event-days per yearabout 0.421 days per yearevent-days in 0 of 30 years, 1996 to 2025 (0%)7.852005-11-12 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.
Drought6.48event-days per yearabout 6.48 days per yearPossibleevent-days in 2 of 30 years, 1996 to 2025 (6.67%)2382000 to 2025 (25.25 years; D3 and D4 only)countywideNRI gives about 6.48 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 2 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.
Earthquake0.00107annual probability at a locationchance a given location in the county has at least minor-damage shaking in a year: 0.107%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.
Hail2.52events per yearabout 2.52 per yearHighly likelyFEMA annualized frequency (modeled)98.8 (modeled)1986 to 2023 (38 years)countywide
Heat Wave8.53event-days per yearabout 8.53 days per yearLikelyevent-days in 5 of 30 years, 1996 to 2025 (16.7%)1332005-11-12 to 2024-11-12 (19 years)countywideNRI gives about 8.53 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 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.
Hurricane0.378events per yearabout 1 in 3 yearsLikelyFEMA annualized frequency (modeled)1311851 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 Storm0.653event-days per yearabout 0.653 days per yearPossibleevent-days in 1 of 30 years, 1996 to 2025 (3.33%)391946-12-31 to 2014-02-12 (67 years)countywide
Inland Flooding1.54event-days per yearabout 1.54 days per yearLikelyevent-days in 21 of 30 years, 1996 to 2025 (70%)431996 to 2023 (28 years)see B1-f
Landslide0.119events per year (modeled)about 1 in 8 yearsLikelyFEMA annualized frequency (modeled)not shownmodeledsee B1-f
Lightning55.9days per year with a strikeabout 55.9 days per yearHighly likelyFEMA annualized frequency (modeled)not shown1995 to 2023 (29 years; CONUS)countywide
Strong Wind1.21events per yearabout 1.21 per yearHighly likelyFEMA annualized frequency (modeled)421986 to 2023 (38 years)countywide
Tornado0.59events per yearabout 0.59 per yearLikelyFEMA 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)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)
Volcanic Activityannual probabilitynot shownmodeledsee B1-fNot Applicable in NRI for this county; no descriptor.
Wildfire0.00129annual probability at a locationchance a given location in the county burns in a year: 0.129%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 Weather2.55event-days per yearabout 2.55 days per yearPossibleevent-days in 1 of 30 years, 1996 to 2025 (3.33%)48.12005-11-12 to 2024-11-12 (19 years)countywideNRI gives about 2.55 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 1 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 202565302.17
Hail2.00 in+1996 to 20252300.0667
Strong Wind (Thunderstorm Wind records)50-64 kt1996 to 2025158305.27
Strong Wind (Thunderstorm Wind records)65 kt+1996 to 20253300.1
Strong Wind (Thunderstorm Wind records)unmeasured or below 50 kt1996 to 202510300.333
TornadoEF0-11996 to 202525300.833
TornadoEF2-31996 to 20252300.0667
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 45Not Applicable 45
Coastal Flooding42 of 4569.877.499.9Very High 1, Relatively High 1, Relatively Moderate 5, Relatively Low 17, Very Low 18, No Rating 3
Cold Wave45 of 4518.641.262.8Relatively Moderate 14, Relatively Low 30, 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.
Drought39 of 4567.374.887.5Relatively Low 12, Very Low 27, No Rating 6National 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.
Earthquake45 of 456.832.379.7Relatively Moderate 1, Relatively Low 13, Very Low 31
Hail45 of 4510.145.961.0Relatively Low 33, Very Low 12National 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 Wave45 of 455.966.087.4Relatively High 2, Relatively Moderate 29, 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.
Hurricane45 of 4586.199.0100.0Very High 39, Relatively High 4, Relatively Moderate 2
Ice Storm45 of 456.862.585.4Relatively Moderate 15, Relatively Low 26, Very Low 4National 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 Flooding45 of 450.839.379.8Relatively High 1, Relatively Moderate 16, Relatively Low 19, Very Low 9
Landslide45 of 4518.453.683.0Relatively Low 1, Very Low 44
Lightning45 of 4517.383.897.7Very High 2, Relatively High 29, Relatively Moderate 12, 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.
Strong Wind45 of 4515.071.587.0Relatively High 6, Relatively Moderate 30, Relatively Low 8, 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.
Tornado45 of 4522.666.786.1Relatively High 12, Relatively Moderate 24, Relatively Low 8, Very Low 1
Tsunami0 of 45Insufficient Data 45
Volcanic Activity0 of 45Not Applicable 45
Wildfire45 of 4552.883.795.8Relatively Moderate 15, Relatively Low 25, Very Low 5
Winter Weather45 of 4552.096.799.5Very High 31, Relatively High 12, Relatively Moderate 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. 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
Onslow CountyCountyApproved, expires 2031-04-20FMA RL 16, SRL 32; any 192$10,804,208.690; 0Includes $336,958.61 for declarations not counted as hazard incidents (DR-4487-NC).
Holly Ridge townTownApproved, expires 2031-04-20FMA RL 0, SRL 1; any 2$281,164.637; 0
Jacksonville cityCityApproved, expires 2031-04-20FMA RL 0, SRL 4; any 28$9,200,136.7656; 0
North Topsail Beach townTownApproved, expires 2031-04-20FMA RL 3, SRL 31; any 199$38,684,086.085; 0
Richlands townTownApproved, expires 2031-04-20FMA RL 0, SRL 0; any 0$235,197.5829; 0
Swansboro townTownApproved, expires 2031-04-20FMA RL 1, SRL 4; any 17$1,060,241.5626; 0

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.

  • 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 2026-04-21county-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$2,604,410,65810,292$2,624,821$195,6210.101%
Cold Wave$33,850,515,234$220,908,208202,949$9,980$72,395$1,696,629under 0.0001%
Drought$25,563,388$48,1830.188% (agriculture)NRI has no building exposure for this hazard; agriculture shown
Earthquake$56,660,543,827204,576$649,756$183,9430.00115%
Hail$33,850,515,234$220,908,208202,949$84,294$28,044$153,7030.000249%
Heat Wave$33,850,515,234$220,908,208202,949$195$516$3,109,125under 0.0001%
Hurricane$33,850,515,234$220,908,208202,949$157,476,825$3,644,832$9,491,7340.465%
Ice Storm$33,815,479,459202,702$334,943$59,1760.000991%
Inland Flooding$33,802,027,657$4,678,8347,049$22,122,799$101,600$552,427n/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$123,849,878702$734$80.000593%
Lightning$33,850,515,234202,949$151,393$1,625,7430.000447%
Strong Wind$33,850,515,234$220,908,208202,949$454,616$152,888$1,070,6020.00134%
Tornado$33,850,515,234$220,908,208202,949$1,505,554$4,337$5,356,5720.00445%
TsunamiNRI publishes no building exposure for this county
Volcanic ActivityNot Applicable in NRI for this county
Wildfire$7,427,598,798$119,668,61969,383$836,671$1,493$129,7420.0113%
Winter Weather$33,850,515,234$220,908,208202,949$181,764$305$1,609,8520.000537%

Totals since 2026-04-21 (Storm Events through 2026-06-30): 2 county-coded records, 0 with a damage value recorded (including $0), $0; 2 zone-level records, 0 with a damage value recorded (including $0), $0 reported for the zone; Public Assistance on counted declarations none found (0 declarations, 0 with PA).

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
Population202,949
Building value (total, not at risk)$33,850,515,234
Agriculture value (total, not at risk)$220,908,208
NRI risk rating (all hazards)Relatively High
Expected annual loss, buildings and agriculture, all hazards$190,488,939
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)$25,234,877
Social vulnerability ratingVery Low
Community resilience ratingRelatively Moderate
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)21Severe repetitive loss, FMA definition (44 CFR 77.2)78
Repetitive loss, NFIP insurance definition484Severe repetitive loss, NFIP insurance definition69

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 total2178484694977193
JACKSONVILLE, CITY OF0428428014
SWANSBORO, TOWN OF141741704
SURF CITY, TOWN OF (plan member listed on the Pender County page)1659659029
ONSLOW COUNTY*163218427192538
NORTH TOPSAIL BEACH, TOWN OF331194271992108
HOLLY RIDGE, TOWN OF0121200
State level, not in this county: county not reported0020200

59 of the county's repeat-flood properties belong to NFIP communities whose plan member is not listed on this page (the community rows above name the page that lists it).

Repeat-flood properties by plan member (NFIP community)

MemberNFIP community IDRL, FMApropertiesSRL, FMApropertiesRL, NFIPpropertiesSRL, NFIPpropertiesAny categorypropertiesMitigatedpropertiesCurrently insuredpropertiesNote
Onslow County370340163218427192538
Holly Ridge town3705750121200
Jacksonville city3701780428428014
North Topsail Beach town370466331194271992108
Richlands town3703410000000
Swansboro town370179141741704

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 residential1860391514036165
2 to 4 unit residential1754754011
other residential0318318010
non-residential282182217
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 5 properties are FMA repetitive loss but not NFIP repetitive loss, and 468 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

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).

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). Onslow County, NC: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-28; County area 37133). 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_NC_37133. Preview: automated baseline.