Onslow County, North Carolina: Natural Disaster Risk and History
Onslow County, North Carolina has a Relatively High natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 95.0 out of 100, higher than about 95% of US counties, with hurricanes, winter storms and lightning scoring highest of its 18 hazards and $216 million a year in expected losses.
OpenFEMA lists 28 federal disaster declarations that included Onslow County since 1996, not counting 2 for COVID-19; the latest is EM-3637-NC (Severe Winter Storm, declared 24 January 2026). NOAA's Storm Prediction Center recorded 49 tornadoes touching Onslow County from 1950 to 2025.
Live weather alerts for North Carolina All official warnings Latest FEMA declarations
Population 202,949 Buildings worth $34 billion Area 914 sq mi Risk rank in North Carolina 5 of 100 FIPS 37133
All 18 hazards, highest risk first
FEMA National Risk Index| Hazard | Risk rating | Score | Expected loss a year | How often | Events in record |
|---|---|---|---|---|---|
| Hurricane | Very High | 99.0 | $171 million | about once every 2.6 years | 131 |
| Winter weather | Very High | 98.4 | $1.8 million | about 2.6 a year | 48 |
| Lightning | Relatively High | 92.4 | $1.8 million | about 56 a year | 175,658 strikes |
| Heat wave | Relatively Moderate | 87.5 | $3.1 million | about 8.5 a year | 133 |
| Wildfire | Relatively Low | 85.9 | $967,906 | about once every 775 years | — |
| Tornado | Relatively Moderate | 85.8 | $6.9 million | about once every 1.7 years | 44 |
| Coastal flooding | Relatively Moderate | 81.0 | $2.8 million | about 3.3 a year | — |
| Strong wind | Relatively Moderate | 80.6 | $1.7 million | about 1.2 a year | 42 |
| Inland flooding | Relatively Moderate | 78.6 | $23 million | about 1.5 a year | 43 |
| Ice storm | Relatively Moderate | 76.4 | $394,119 | about once every 1.5 years | 39 |
| Earthquake | Relatively Low | 66.7 | $833,699 | about once every 935 years | — |
| Cold wave | Relatively Low | 60.4 | $1.8 million | about once every 2.4 years | 7.8 |
| Hail | Relatively Low | 44.4 | $266,042 | about 2.5 a year | 99 |
| Landslide | Very Low | 38.6 | $742 | about once every 8.4 years | — |
| Drought | Relatively Low | 34.6 | $48,183 | about 6.5 a year | 238 |
| Avalanche | Not Applicable | — | — | — | — |
| Tsunami | Insufficient Data | — | — | — | — |
| Volcanic activity | Not Applicable | — | — | — | — |
Score: FEMA's percentile among US counties that face the hazard (higher = more risk). Expected loss: FEMA's modelled average yearly loss to buildings, people (as a statistical value) and crops. How often: FEMA's annualised frequency of the hazard in the county; for some hazards it counts event-days, so it is a rough guide, not a forecast. "Not Applicable" means FEMA does not model that hazard here.
Federal disaster declarations 28
Most common: Hurricane 22, Tropical Storm 3, Severe Storm 2, Winter Storm 1.
| Decade | Declarations | Incident types |
|---|---|---|
| 1990s | 6 | Hurricane ×6 |
| 2000s | 4 | Hurricane ×4 |
| 2010s | 11 | Hurricane ×9, Severe Storm ×2 |
| 2020s | 7 | Tropical Storm ×3, Hurricane ×3, Winter Storm |
The last 10
Widest declarations that included Onslow County
- Severe Winter Storm (2026, EM-3637-NC): 100 North Carolina counties designated.
- Hurricane Helene (2024, EM-3617-NC): 100 North Carolina counties designated.
- Hurricane Ian (2022, EM-3586-NC): 100 North Carolina counties designated.
Named storms in its declarations: Hurricane Helene (2024), Tropical Storm Debby (2024), Hurricane Ian (2022), Hurricane Isaias (2020), Hurricane Dorian (2019), Hurricane Florence (2018), Hurricane Matthew (2016), Hurricane Irene (2011), Hurricane Earl (2010), Hurricane Ophelia (2005), Hurricane Katrina (2005), Hurricane Isabel (2003), Hurricane Floyd (1999), Hurricane Dennis (1999), Hurricane Bonnie (1998), Hurricane Fran (1996), Hurricane Bertha (1996).
Not counted above: 2 COVID-19 ("Biological") declarations — in 2020 every US county was included. North Carolina also had 9 statewide declarations with no county list.
Tornado record since 1950 49
| Tornadoes touching the county | 49 |
|---|---|
| Strongest-rated | (E)F3 ×1 |
| Peak month | April (8) |
| Deadliest | 2 Jul 1986, F2, 1.5 mi path, 3 killed, 10 injured |
| Longest path | 15 Apr 1999, F1, 10 mi path, 0 killed, 7 injured |
| Most recent | 24 May 2024, EF1, 8.8 mi path |
| Deaths / injuries on those paths | 3 / 59 |
| Rating | (E)F0 | (E)F1 | (E)F2 | (E)F3 | (E)F4 | (E)F5 | Unrated |
|---|---|---|---|---|---|---|---|
| Count | 28 | 16 | 4 | 1 | 0 | 0 | 0 |
| Decade | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s | 2010s | 2020s |
|---|---|---|---|---|---|---|---|---|
| Count | 2 | 3 | 3 | 6 | 13 | 16 | 3 | 3 |
Deaths and injuries are for each tornado's whole path, which can run beyond this county. F-scale ratings before February 2007, Enhanced Fujita (EF) after.
How Onslow County compares with its 5 nearest counties
| County | Distance | Overall risk | Score | Top hazard |
|---|---|---|---|---|
| Onslow County (this page) | — | Relatively High | 95.0 | Hurricane |
| Jones County | 32 km | Relatively Low | 64.5 | Hurricane |
| Pender County | 49 km | Relatively Moderate | 86.9 | Hurricane |
| Duplin County | 50 km | Relatively Moderate | 89.4 | Hurricane |
| Craven County | 53 km | Relatively Moderate | 93.6 | Hurricane |
| Lenoir County | 59 km | Relatively Moderate | 84.6 | Winter weather |
Nearest by distance between county centres. Every county in North Carolina, ranked.
Vulnerability and resilience
| Social vulnerability | Very Low 14.4 |
|---|---|
| Community resilience | Relatively Moderate 40.6 |
| Community risk factor | 0.83 |
| Expected annual loss, all hazards | $216 million |
FEMA scales expected losses up where social vulnerability is high (people who may find it harder to prepare, evacuate or recover) and down where community resilience is high. A factor above 1 raises the risk score. For social vulnerability a high rating is worse; for resilience a high rating is better.
Prepare for Onslow County's main hazards
- Right now: National Weather Service alerts for North Carolina · all official warnings on Global Incident Tracker.
- Hurricane: Is there a hurricane now? · Cyclone preparation
- Winter weather: Power outages now · Carbon monoxide in winter
- Lightning: Weather alerts for North Carolina
- Your property's flood zone: FEMA Flood Map Service Center ↗ — this page cannot tell you that.
- Official preparedness guidance: Ready.gov ↗ and your county emergency management office.
What this page shows, and what it misses
FEMA's National Risk Index rates a whole county against every other US county; it is a planning-level estimate for nationwide comparison, not a flood-zone map and not a substitute for a local risk assessment or the risk to one home. Declarations are presidential disaster, emergency and fire management declarations that named this county; state declarations and SBA or USDA designations are not included. Tornadoes are counted when the county is one of up to four listed on the track; 670 tornadoes that crossed a state line carry no county list in NOAA's file and are left out.
Federal Emergency Management Agency (FEMA), National Risk Index Dataset: National Risk Index Counties - v1.20.0 (December 2025). Retrieved from https://services.arcgis.com/XG15cJAlne2vxtgt/ArcGIS/rest/services/National_Risk_Index_Counties/FeatureServer/0/query on November 2, 2026, 1:20 PM EST. This product uses the Federal Emergency Management Agency’s National Risk Index dataset API or downloadable datasets 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).
Federal Emergency Management Agency (FEMA), OpenFEMA Dataset: Disaster Declarations Summaries - v2, retrieved from https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries on November 2, 2026, 1:21 PM EST. 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).
Tornado records: NOAA/NWS Storm Prediction Center, Severe Weather Database, tornadoes 1950–2025 (https://www.spc.noaa.gov/wcm/data/1950-2025_actual_tornadoes.csv, downloaded 2 November 2026). Public domain; not endorsed by NOAA. Compiled by Global Incident Tracker.
Questions about Onslow County
What natural disasters is Onslow County, North Carolina most at risk from?
Onslow County, North Carolina has a Relatively High natural-hazard risk rating in FEMA's National Risk Index (v1.20, December 2025): a score of 95.0 out of 100, higher than about 95% of US counties, with hurricanes, winter storms and lightning scoring highest of its 18 hazards and $216 million a year in expected losses.
How many federal disaster declarations has Onslow County had?
OpenFEMA lists 28 federal disaster declarations that included Onslow County since 1996, not counting 2 for COVID-19; the latest is EM-3637-NC (Severe Winter Storm, declared 24 January 2026). Another 9 North Carolina declarations were made statewide without a county list.
How many tornadoes have hit Onslow County?
NOAA's Storm Prediction Center recorded 49 tornadoes touching Onslow County from 1950 to 2025. The deadliest: 2 Jul 1986, F2, 1.5 mi path, 3 killed, 10 injured (deaths and injuries are for the whole path).
Is the National Risk Index a flood zone map?
No. The National Risk Index is a planning-level estimate for a whole county, built for nationwide comparison. It does not tell you the flood zone or the risk of a single property: for that, look up the address on FEMA's Flood Map Service Center (msc.fema.gov) and ask your local floodplain manager.