Disaster Data / States / Massachusetts / Nantucket County

County

Nantucket County, Massachusetts

Nantucket County recorded 13 federal disaster and emergency declarations since FY2000 (through FY2025): 5 major disasters, 8 emergencies, and 0 fire-management declarations. Its most common hazard is hurricane.

Highlighted: Nantucket County, MA

Totals: FY2000–FY2025 · Page last rebuilt Sep 12, 2026 · the current in-progress fiscal year is not included in totals

13
Declarations since FY2000
5
Major disasters (DR)
8
Emergencies (EM)
0
Fire management (FM)
Sep 2023
Most recent

The federal disaster record for Nantucket County runs between 2003 and 2023, covering 13 declarations in all. Its most recent major disaster declaration was Covid-19 Pandemic in 2020. The hazards behind these declarations were most often hurricane, severe storm, and biological.

Risk and vulnerability context

Historical declarations show what has happened here. These national datasets add context about underlying natural-hazard risk and community vulnerability.

County FIPS 25019
CDC / ATSDR

Social Vulnerability Index

2022 county-level SVI
10.3
overall percentile nationally

Approximately 10.3% of U.S. counties have an equal or lower overall SVI ranking.

Socioeconomic status17.3
Household characteristics4.4
Racial and ethnic minority status65.5
Housing type and transportation12.0

Higher percentiles indicate greater relative social vulnerability within the CDC SVI framework. CDC SVI documentation

FEMA

National Risk Index

December 2025
38.7
overall risk score
Very Low
Expected annual loss$22.9MRelatively Low
NRI social vulnerability10.6Very Low
Community resilience99.0Very High

The NRI combines expected annual loss, social vulnerability, and community resilience to describe relative natural-hazard risk. FEMA NRI documentation

About these measures: CDC Social Vulnerability Index and FEMA National Risk Index Social Vulnerability are separate measures built with different methods. They are shown side by side for context and should not be interpreted as equivalent scores.

Assistance to households (Individual Assistance)

FEMA Individual Assistance to households in this jurisdiction, combined across the Housing Assistance owner and renter programs. Valid registrations are households that applied within a designated Individual Assistance area; approved counts and dollars are the households FEMA found eligible under the Individuals and Households Program. Figures are self-reported and drawn from NEMIS through OpenFEMA, not audited, and Individual Assistance exists only for disasters where it was designated, so many jurisdictions show none.

5
valid registrations
3
households approved
$10,829
total IHP approved
Assistance typeApproved amount
Other needs$10,829

Hazard mitigation, what has been funded here

Federal Hazard Mitigation Assistance obligated to this jurisdiction to reduce future disaster losses, across the FEMA mitigation programs. This is the record of past mitigation investment a local hazard mitigation plan documents. Figures are federal share obligated, reported through OpenFEMA and not audited, and are separate from the Public Assistance funding above.

$196,350
federal mitigation share
5
funded projects
ProgramProjectsFederal share obligated
Hazard Mitigation Grant Program(HMGP)3$121,369
Pre-Disaster Mitigation(PDM)1$44,253
Flood Mitigation Assistance(FMA)1$30,728

Most common hazards

Previous occurrences, for your mitigation plan

Every local hazard mitigation plan must document previous occurrences of each hazard. Here is that record for Nantucket County, sourced to OpenFEMA and refreshed weekly. Copy it straight into your plan.

HazardDateFEMA declarationType
HurricaneSep 15, 2023EM-3599-MAEM
BiologicalMar 27, 2020DR-4496-MADR
BiologicalMar 13, 2020EM-3438-MAEM
Severe StormJun 25, 2018DR-4372-MADR
Severe StormApr 13, 2015DR-4214-MADR
Severe StormApr 19, 2013DR-4110-MADR
HurricaneDec 19, 2012DR-4097-MADR
HurricaneOct 28, 2012EM-3350-MAEM
HurricaneAug 26, 2011EM-3330-MAEM
HurricaneSep 2, 2010EM-3315-MAEM
HurricaneSep 13, 2005EM-3252-MAEM
SnowstormFeb 17, 2005EM-3201-MAEM
SnowstormMar 11, 2003EM-3175-MAEM

Every declaration on record

DR = Major disaster (Stafford Act) · EM = Emergency declaration · FM = Fire management assistance

Showing 13 declarations

DateNumberTypeHazardTitle
Sep 15, 2023EM-3599-MAEMHurricaneHurricane Lee
Mar 27, 2020DR-4496-MADRBiologicalCovid-19 Pandemic
Mar 13, 2020EM-3438-MAEMBiologicalCovid-19
Jun 25, 2018DR-4372-MADRSevere StormSevere Winter Storm And Flooding
Apr 13, 2015DR-4214-MADRSevere StormSevere Winter Storm, Snowstorm, And Flooding
Apr 19, 2013DR-4110-MADRSevere StormSevere Winter Storm, Snowstorm, And Flooding
Dec 19, 2012DR-4097-MADRHurricaneHurricane Sandy
Oct 28, 2012EM-3350-MAEMHurricaneHurricane Sandy
Aug 26, 2011EM-3330-MAEMHurricaneHurricane Irene
Sep 2, 2010EM-3315-MAEMHurricaneHurricane Earl
Sep 13, 2005EM-3252-MAEMHurricaneHurricane Katrina Evacuation
Feb 17, 2005EM-3201-MAEMSnowstormRecord And/Or Near Record Snow
Mar 11, 2003EM-3175-MAEMSnowstormSnow
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How these numbers are built

Drawn from FEMA's OpenFEMA Disaster Declarations Summaries, rebuilt each week. A declaration is counted here once for each designated area it names, so a single disaster covering many localities is counted in each one. For that reason these jurisdiction counts do not sum to Massachusetts's statewide total. This page counts declarations that named this jurisdiction as a designated area. Totals cover complete fiscal years (Oct 1 to Sep 30); the in-progress year may appear in the most-recent list but is not counted in the totals. Uses OpenFEMA data but is not endorsed by or affiliated with FEMA.

Cite this profile

Choose a citation style, then copy the formatted citation. This profile is derived from FEMA OpenFEMA data and is updated as the underlying Disaster Data build is refreshed.

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