FEMA Records
17
Below median
Delaware · FEMA + NOAA + National Risk Index
New Castle County, DE
17 FEMA disaster declarations (1965-2022), with a FEMA National Risk Index rating of Relatively High. Most common hazard: Hurricane.
- 17
- FEMA declarations
- 11
- Major disasters
- 95
- NRI risk · Relatively High
- Hurricane
- Top hazard
The verdict
New Castle County has a nationally busy FEMA history: 17 declarations, more than 32% of counties in this registry. But the state comparison tempers that reading: the total is 6% below the Delaware county mean. FEMA's separate National Risk Index places the county in the riskiest 5%; that score models loss and vulnerability rather than counting declarations.
- Riskiest 5%
- of U.S. counties for FEMA National Risk Index score
- Relatively High
- FEMA National Risk Index rating
- 17
- FEMA declarations vs 21 national county avg
- 1,573
- NFIP flood insurance claims filed
FEMA's National Risk Index and its declaration registry are separate measures. This county's registry includes Major Disaster (DR) and Emergency (EM) records; an EM authorizes a narrower set of federal assistance than a DR.
FEMA OpenFEMA declaration desk
County FIPS 10003 · New Castle County 17 declarations · rank 2153/3,266
DECL-MID · MAJOR-MID · RANK-LOWER · PHOTO-FINISH · NRI-HIGH · ACT-HIGH · TYPE-LEAD · VS-ST-BELOW
- DECL-MID 17
- MAJOR-MID 65%
- RANK-LOWER #2,153
- PHOTO-FINISH Curry
- NRI-HIGH 95
- ACT-HIGH High
- TYPE-LEAD Hurricane
- VS-ST-BELOW -6%
Nearest declaration peer: Curry, OR (0 declaration gap)
FEMA Disaster Declarations Summaries v2 filing stamps for this county register. Read with this county → · Delaware state profile
New Castle County among counties with fewer federal records
FEMA declaration records among New Castle County and nearest peers by total count
- Los Angeles · largest
Los Angeles · largest
88 declarations
- Curry · near 17
Curry · near
17 declarations
- Murray · near 17
Murray · near
17 declarations
- New Castle · this county 17
New Castle · this county
17 declarations
- Washington · near 17
Washington · near
17 declarations
- Ujelang · smallest 1
Ujelang · smallest
1 declarations
What this shows New Castle County carries 17 FEMA declaration records, ranked 2153 of 3,266 counties in this registry.
New Castle County versus quieter counties in this dataset
New Castle County among lower-declaration counties nationally
FEMA disaster declarations, all-time · New Castle County
17 32nd percentile higher than 32% of 3,266 counties
Each bar is a band; taller bars hold more counties. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source FEMA Disaster Declarations Summaries v2 · 2026-08-25
New Castle County's FEMA Risk Index score
Which hazard drives modeled loss here?
FEMA's modeled annual dollar loss for New Castle County is led by Riverine Flooding (about $150.5M Expected Annual Loss, Historical Loss Ratio Relatively High), while Winter Weather carries the highest National Risk Index rating (Very High). EAL and risk score use different inputs; they need not agree.
Source: FEMA National Risk Index (December 2025 release) - Expected Annual Loss vs composite risk rating by hazard.
What does New Castle County's hazard record show?
Reading the federal records together
FEMA's NFIP table contains a substantial paid-claim history for this county: 1,573 claims and $51.7M in payments. PlainHazard labels 500 or more claims a heavy registry record; that is a reporting bucket, not an official FEMA risk grade. The average paid claim was $32.8K. NFIP totals exclude uninsured flood losses and do not measure how many properties currently carry a policy.
Start with the state benchmark: a Delaware county averages 18.0 federal declaration records, while New Castle County has 17. The gap is 6% below that mean. Fewer entries indicate a quieter history of recorded federal actions, not immunity from a hazard and not a prediction about what happens next.
FEMA National Risk Index
This county sits among the highest-risk counties nationally on FEMA's National Risk Index, a composite score of 95.3/100 (Relatively High). Expected Annual Loss is rated Relatively High (roughly $202.2M in annualized losses). Social vulnerability reads Relatively Low and community resilience Very High, both critical modifiers of realized harm here. Of the 18 hazards FEMA models, Winter Weather stands out as the sharpest exposure here, rated Very High. FEMA's modeled frequency puts that hazard at an average of 10 times per year here, based on 197 historical events on record.
53 /100
Historical Activity Index
High historical activity
New Castle County, DE · PlainHazard-derived composite from federal records
This 0–100 index is an explicit PlainHazard composite from FEMA declaration history only on the county surface (this DB has no county-level NOAA damage row) . It is not FEMA's National Risk Index, not a forecast, and not a safety, insurance, or preparedness rating. Open the calculator · Methodology
FEMA Declarations (1953–present) Moderate
12/30
17 OpenFEMA declarations, full ingest window (0.8x national county average)
County Disaster Density Moderate
12/25
17 declarations (0.9x state county average of 18)
Major Disaster Share High
16/25
11 of 17 declarations are major disasters (65%)
Hazard Diversity High
13/20
5 different disaster types declared in New Castle County
FEMA NRI 8-hazard radar - New Castle County
How to read this radar
Each axis: NRI risk rating (Very Low-Very High) on a 0-100 scale. Rounder = broad exposure; spiky = one or two hazards dominate.
Major Disaster share
65%
Major-heavy
NRI risk score
95
Relatively High
Source: FEMA National Risk Index Per-county per-hazard ratings, December 2025 release
How often does each hazard strike New Castle County?
FEMA's National Risk Index models a historical event count and an annualized frequency for each hazard type. Most hazards are expressed as modeled occurrences per year; FEMA expresses drought and heat-wave frequency as event-days per year. These modeled frequencies are not forecasts.
| Hazard | NRI Risk Rating | Recurrence |
|---|---|---|
| Winter Weather | Very High | an average of 10 times per year |
| Riverine Flooding | Relatively High | an average of 6.6 times per year |
| Heat Wave | Relatively Moderate | 11 modeled event-days per year |
| Cold Wave | Relatively High | roughly once every 1 years |
| Earthquake | Relatively Moderate | roughly once every 618 years |
| Ice Storm | Relatively High | an average of 1 time per year |
| Hurricane | Relatively Moderate | roughly once every 11 years |
| Strong Wind | Relatively High | an average of 6.3 times per year |
| Tornado | Relatively Moderate | roughly once every 4 years |
| Drought | Relatively Moderate | 5.9 modeled event-days per year |
| Coastal Flooding | Relatively High | an average of 3.7 times per year |
| Lightning | Relatively Moderate | an average of 35 times per year |
| Landslide | Relatively Low | roughly once every 7 years |
| Wildfire | Very Low | roughly once every 2,069 years |
| Hail | Very Low | an average of 2.3 times per year |
Source: FEMA National Risk Index Modeled annualized frequency; drought and heat wave use event-days/year, December 2025 release
Disaster Types
Hurricane 9
Snowstorm 4
Biological 2
Severe Storm 1
Drought 1
What Hurricane declarations mean here
Hurricane is the most frequent declaration type on New Castle County's federal record, 53% of its declarations. Atlantic tropical systems run on a defined season, 1 June to 30 November, with most activity concentrated between August and October; Pacific and territorial basins run on their own calendars. A single named storm routinely produces one declaration number covering a long corridor of counties at once, well inland as well as on the coast, which is why an affected county's count can jump by several in one year without several separate events having occurred.
One practical distinction matters when reading these records: a tropical declaration usually bundles wind, storm surge and inland rainfall flooding under a single incident, but the insurance behind them is split. Wind damage falls to property insurers, while flood and surge damage is covered only under a separate National Flood Insurance Program policy. That is why a county can show heavy declaration activity and a comparatively small NFIP claims record, or the reverse.
Declaration counts describe past federal action. They are a record of what was declared, not a forecast of future hazard probability.
Declaration Types
What DR / EM / FM mean
FEMA categorizes declarations as Major Disasters (DR), Emergencies (EM), or Fire Management Assistance (FM).
Major Disaster - 11 64.7%
of all 17 declarations
Emergency - 6 35.3%
of all 17 declarations
FEMA Declarations Timeline
| Year | Declarations | |
|---|---|---|
| 2022 | 1 | |
| 2021 | 1 | |
| 2020 | 2 | |
| 2013 | 2 | |
| 2011 | 1 | |
| 2010 | 1 | |
| 2005 | 2 | |
| 2003 | 3 | |
| 1999 | 1 | |
| 1996 | 1 | |
| 1993 | 1 | |
| 1965 | 1 | |
Disaster Declarations
How the 17 FEMA declarations break into federal action codes (DR / EM / FM). Same DISTINCT grain as the table below.
Download these 17 declarations as CSV . FEMA source data is public domain; our derived presentation is CC0.
| DR# | Title | Type | Incident | Date |
|---|---|---|---|---|
| 4627 | REMNANTS OF HURRICANE IDA | DR | Hurricane | 2021-10-24 |
| 4566 | TROPICAL STORM ISAIAS | DR | Hurricane | 2020-10-02 |
| 4526 | COVID-19 PANDEMIC | DR | Biological | 2020-04-05 |
| 3449 | COVID-19 | EM | Biological | 2020-03-13 |
| 4090 | HURRICANE SANDY | DR | Hurricane | 2012-11-16 |
| 3357 | HURRICANE SANDY | EM | Hurricane | 2012-10-29 |
| 3336 | HURRICANE IRENE | EM | Hurricane | 2011-08-28 |
| 1896 | SEVERE WINTER STORMS AND SNOWSTORMS | DR | Snowstorm | 2010-03-31 |
| 3263 | HURRICANE KATRINA EVACUATION | EM | Hurricane | 2005-09-30 |
| 1572 | SEVERE STORMS, TORNADOES, AND FLOODING FROM THE REMNANTS OF | DR | Severe Storm | 2004-11-15 |
| 1495 | TROPICAL STORM HENRI | DR | Hurricane | 2003-09-23 |
| 1494 | HURRICANE ISABEL | DR | Hurricane | 2003-09-20 |
| 3183 | SNOW | EM | Snowstorm | 2003-03-20 |
| 1297 | HURRICANE FLOYD MAJOR DISASTER DECLARATIONS | DR | Hurricane | 1999-09-21 |
| 1082 | BLIZZARD OF 96 (SEVERE SNOW STORM) | DR | Snowstorm | 1996-01-12 |
| 3111 | SEVERE SNOWFALL & WINTER STORM | EM | Snowstorm | 1993-03-18 |
| 207 | WATER SHORTAGE | DR | Drought | 1965-08-18 |
Storm Events in Delaware
Statewide NOAA context only. PlainHazard does not currently attribute these state totals to New Castle County.
| Storm Type | Events | Fatalities | Injuries | Property Damage |
|---|---|---|---|---|
| Thunderstorm Wind | 492 | 1 | 10 | $196.0K |
| Heavy Rain | 222 | 0 | 0 | $0 |
| Winter Weather | 132 | 1 | 50 | $0 |
| Flash Flood | 102 | 0 | 0 | $3.7M |
| Coastal Flood | 95 | 0 | 0 | $12.0K |
Source: NOAA Storm Events Database State-level aggregated data, 2015-2025
NFIP Flood Insurance Claims
Total Claims
1,573
Total Paid
$51.7M
Avg Per Claim
$32.8K
Source: FEMA National Flood Insurance Program (NFIP) OpenFEMA Claims Data
FEMA National Risk Index
Overall Risk
Relatively High
Score: 95.3/100
Expected Annual Loss
Relatively High
$202.2M/year
Social Vulnerability
Relatively Low
Community Resilience
Very High
Hazard Risk Breakdown
Winter Weather Very High
Riverine Flooding Relatively High
Heat Wave Relatively Moderate
Cold Wave Relatively High
Earthquake Relatively Moderate
Ice Storm Relatively High
Hurricane Relatively Moderate
Strong Wind Relatively High
Tornado Relatively Moderate
Drought Relatively Moderate
Coastal Flooding Relatively High
Lightning Relatively Moderate
Landslide Relatively Low
Wildfire Very Low
Hail Very Low
Source: FEMA National Risk Index (NRI) Ratings reflect relative scores among all US counties. Data: hazards.fema.gov/nri
The model's sharpest exposure here: Winter Weather
Winter Weather in the model means the accumulation of snow and cold that disrupts rather than destroys: road closures, roof loads, burst pipes and lost heating. Its costs land heavily on transport and on households least able to absorb an interruption.
Worth noting for New Castle County: the model and the federal record do NOT point at the same hazard. Winter Weather carries the highest modeled rating (Very High), while the county's declaration history is led by Hurricane. That is not a contradiction, the two measure genuinely different things. Declarations record federal ACTION, which requires damage costly enough to exceed state and local capacity; the Risk Index models EXPECTED annual loss across all 18 hazards whether or not any declaration ever followed. A hazard can be the county's largest modeled exposure and never once have driven a declaration.
National Risk Index ratings are modeled estimates of expected annual loss, not predictions of what will happen in any given year.
Data-matched county comparisons
New Castle County's closest FEMA peer: Utah County, UT
Comparisons use published FEMA declaration fields plus the National Risk Index composite for New Castle County. Record similarity, not a safety rating.
Similar modeled NRI score
New Castle County: NRI composite 95.3 (Relatively High).
Similar Major-disaster share
New Castle County: 11 of 17 of its declarations are Major.
Closest declaration profiles
New Castle County shows 17 FEMA declarations, led by Hurricane.
How these peers are chosen
Cohort: Published U.S. county equivalents outside the source state or territory. Each metric keeps six ETL candidates; three unique destinations are shown after de-duplicating across axes. Declaration-volume ranking combines count and Major-disaster share and prefers a different leading incident type; Major-share ranks the Major fraction adjusted for volume; NRI ranks the modeled composite score only.
Retained FEMA snapshot feed for New Castle County - capture-dated entries only.
Compare beyond this state
Nationwide peers by NRI score & FEMA declaration volume
Two PlainHazard-derived comparison paths for New Castle County: nearest out-of-state National Risk Index composite and nearest FEMA declaration count (floor ≥5 records). Record similarity only, not a forecast of the next hazard.
Similar NRI composite
Nearest out-of-state counties by FEMA NRI score. This county: 95.3 (Relatively High).
Similar declaration volume
Nearest out-of-state counties by FEMA declaration count. This county: 17. NRI peers are excluded so the two link sets stay distinct.
Further reading for this county
Understanding disaster data
New Castle County's NFIP claims file (1,573 claims) and FEMA declaration history measure different federal records - this guide separates them from modeled NRI risk.
More PlainHazard guides
- Most disaster-prone counties - U.S. counties ranked by FEMA declaration totals.
- Understanding disaster data - declarations vs storm events vs NRI scores.
- Preparing for natural disasters - household checklist (not county-specific advice).
Frequently Asked Questions
What is the most common disaster type in New Castle County?
The most common disaster type in New Castle County is Hurricane, with 9 declarations. Other disaster types include Snowstorm (4), Biological (2), Severe Storm (1).
How does New Castle County's FEMA declaration record compare with the Delaware average?
The typical Delaware county has 18.0 FEMA declaration records; New Castle County has 17, or 6% fewer. Against the national county mean of 20.7, this county's total is 18% lower. The comparison is historical and says nothing about the probability of a future event.
How many major FEMA disaster declarations has New Castle County received?
New Castle County has received 11 major disaster declarations, representing 65% of all 17 disaster declarations.
How many flood insurance claims has New Castle County filed?
New Castle County has 1,573 National Flood Insurance Program (NFIP) claims totaling $51.7M in payments, with an average of $32.8K per claim.
Does FEMA's top risk-rated hazard match the highest Expected Annual Loss in New Castle County?
No. In New Castle County, Winter Weather has the highest National Risk Index rating (Very High), while Riverine Flooding leads Expected Annual Loss at about $150.5M. FEMA's risk score and dollar-loss model use different inputs, so the leaders often differ.
What was the worst year for disasters in New Castle County?
The most active year for disaster declarations in New Castle County was 2003, with 3 declarations. The county has FEMA disaster data spanning 1965 to 2022.
What is the FEMA National Risk Index score for New Castle County?
According to the FEMA National Risk Index, New Castle County, Delaware has an overall risk score of 95.3 out of 100 (Relatively High). On social vulnerability the county rates Relatively Low; on community resilience, Very High. The Expected Annual Loss (EAL) score is Relatively High, representing $202.2M in annualized losses.
Which natural hazard poses the greatest risk to New Castle County?
Based on FEMA NRI data, the highest-risk natural hazard in New Castle County as of the latest release is Winter Weather (risk rating: Very High). Other significant hazards include Riverine Flooding (Relatively High) and Heat Wave (Relatively Moderate). FEMA's modeled event frequency puts winter weather here at an average of 10 times per year, drawn from 197 historical events on record. The underlying methodology weighs historical event frequency against exposed assets and community vulnerability.
Data Sources & Methodology
Disaster declaration data comes from the FEMA OpenFEMA Disaster Declarations Summaries v2 API, which includes all federally declared disasters, emergencies, and fire management assistance grants.
Storm event data is sourced from the NOAA Storm Events Database (2015-2025), which tracks significant weather events including thunderstorms, tornadoes, floods, and winter storms.
Flood insurance data comes from the FEMA National Flood Insurance Program (NFIP) OpenFEMA claims dataset.
This data is provided for informational purposes only. FEMA disaster declarations represent federal response actions and may not capture all local emergencies or weather events.
FEMA OpenFEMA declarations + NRI for New Castle County · vintage 2026-08-25 · Methodology · Delaware profile · Verify with FEMA OpenFEMA · Verify with NOAA Storm Events