Disaster Data / States / New York / Nassau County
CountyNassau County recorded 20 federal disaster and emergency declarations since FY2000 (through FY2025): 11 major disasters, 9 emergencies, and 0 fire-management declarations. Its most common hazard is hurricane.
Highlighted: Nassau County, NY
Totals: FY2000–FY2025 · Page last rebuilt Sep 12, 2026 · the current in-progress fiscal year is not included in totals
The federal disaster record for Nassau County runs between 2000 and 2024, covering 20 declarations in all. Its most recent major disaster declaration was Severe Storm And Flooding in 2024. The hazards behind these declarations were most often hurricane, severe storm, and biological. Since 2000, FEMA has obligated about $4.9 billion in Public Assistance funding to the jurisdiction, most of it for utilities.
Historical declarations show what has happened here. These national datasets add context about underlying natural-hazard risk and community vulnerability.
Approximately 27.8% of U.S. counties have an equal or lower overall SVI ranking.
Higher percentiles indicate greater relative social vulnerability within the CDC SVI framework. CDC SVI documentation
The NRI combines expected annual loss, social vulnerability, and community resilience to describe relative natural-hazard risk. FEMA NRI documentation
Federal share obligated to this jurisdiction under FEMA Public Assistance since 2000, grouped by damage category. Figures are rounded to the nearest dollar and reflect obligations, which may change as projects close out.
| Category | Projects | Federal share obligated |
|---|---|---|
| Utilities(F) | 243 | $2,900,263,324 |
| Emergency protective measures(B) | 1,222 | $1,263,335,988 |
| Buildings and equipment(E) | 529 | $305,704,875 |
| Debris removal(A) | 472 | $272,429,057 |
| Parks and recreation(G) | 257 | $119,558,165 |
| Management costs(Z) | 110 | $46,713,224 |
| Roads and bridges(C) | 203 | $17,386,667 |
| Water control facilities(D) | 16 | $9,222,808 |
| All categories | 3,052 | $4,934,614,108 |
For each disaster, the wait from the declaration to the first federal obligation (amber), then the federal share obligating after that (teal), on a shared 7-year scale. Typical wait to the first obligation here: about 176 days. An obligation is the federal share committed to the recipient state, not funds disbursed to the locality, which comes later and is not shown.
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.
| Assistance type | Approved amount |
|---|---|
| Repair and replacement | $144,063,932 |
| Rental assistance | $165,752,078 |
| Other needs | $65,644,888 |
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.
| Program | Projects | Federal share obligated |
|---|---|---|
| Hazard Mitigation Grant Program(HMGP) | 33 | $176,501,707 |
| Legislative Pre-Disaster Mitigation(LPDM) | 1 | $3,999,937 |
| Pre-Disaster Mitigation(PDM) | 10 | $2,776,368 |
| Flood Mitigation Assistance(FMA) | 8 | $2,419,448 |
| Severe Repetitive Loss(SRL) | 1 | $123,930 |
Emergency declarations issued by the governor of this state, which are separate from and usually precede a federal declaration. A declaration is listed here when NOAA Storm Events recorded reports of the matched hazard in this jurisdiction while the order was in effect. That is evidence of local impact during a declared state emergency. It is not a statement that the governor named this jurisdiction in the order, since most state declarations apply statewide and name no localities at all. Hazard categories come from the order text. Damage figures are NOAA storm report estimates for this jurisdiction only, not the cost of the declaration.
Archive coverage for New York: 2021-08-24-present comprehensive current archive; earlier official records are selected continuing orders only and are explicitly labeled
Source: state executive order archives collected by DisasterData Plus, joined to NOAA Storm Events. See the Plus overview for per-state coverage and method.
Every local hazard mitigation plan must document previous occurrences of each hazard. Here is that record for Nassau County, sourced to OpenFEMA and refreshed weekly. Copy it straight into your plan.
| Hazard | Date | FEMA declaration | Type |
|---|---|---|---|
| Flood | Jan 30, 2024 | DR-4755-NY | DR |
| Hurricane | Sep 5, 2021 | DR-4615-NY | DR |
| Hurricane | Sep 2, 2021 | EM-3572-NY | EM |
| Hurricane | Aug 22, 2021 | EM-3565-NY | EM |
| Hurricane | Oct 2, 2020 | DR-4567-NY | DR |
| Biological | Mar 20, 2020 | DR-4480-NY | DR |
| Biological | Mar 13, 2020 | EM-3434-NY | EM |
| Hurricane | Oct 30, 2012 | DR-4085-NY | DR |
| Hurricane | Oct 28, 2012 | EM-3351-NY | EM |
| Hurricane | Aug 31, 2011 | DR-4020-NY | DR |
| Hurricane | Aug 26, 2011 | EM-3328-NY | EM |
| Severe Storm | Feb 18, 2011 | DR-1957-NY | DR |
| Severe Storm | Apr 16, 2010 | DR-1899-NY | DR |
| Severe Storm | Dec 31, 2009 | DR-1869-NY | DR |
| Hurricane | Sep 30, 2005 | EM-3262-NY | EM |
| Severe Storm | Aug 3, 2004 | DR-1534-NY | DR |
| Other | Aug 23, 2003 | EM-3186-NY | EM |
| Snowstorm | Mar 27, 2003 | EM-3184-NY | EM |
| Fire | Sep 11, 2001 | DR-1391-NY | DR |
| Other | Oct 11, 2000 | EM-3155-NY | EM |
DR = Major disaster (Stafford Act) · EM = Emergency declaration · FM = Fire management assistance
Showing 20 declarations
| Date | Number | Type | Hazard | Title |
|---|---|---|---|---|
| Jan 30, 2024 | DR-4755-NY | DR | Flood | Severe Storm And Flooding |
| Sep 5, 2021 | DR-4615-NY | DR | Hurricane | Remnants Of Hurricane Ida |
| Sep 2, 2021 | EM-3572-NY | EM | Hurricane | Remnants Of Hurricane Ida |
| Aug 22, 2021 | EM-3565-NY | EM | Hurricane | Hurricane Henri |
| Oct 2, 2020 | DR-4567-NY | DR | Hurricane | Tropical Storm Isaias |
| Mar 20, 2020 | DR-4480-NY | DR | Biological | Covid-19 Pandemic |
| Mar 13, 2020 | EM-3434-NY | EM | Biological | Covid-19 |
| Oct 30, 2012 | DR-4085-NY | DR | Hurricane | Hurricane Sandy |
| Oct 28, 2012 | EM-3351-NY | EM | Hurricane | Hurricane Sandy |
| Aug 31, 2011 | DR-4020-NY | DR | Hurricane | Hurricane Irene |
| Aug 26, 2011 | EM-3328-NY | EM | Hurricane | Hurricane Irene |
| Feb 18, 2011 | DR-1957-NY | DR | Severe Storm | Severe Winter Storm And Snowstorm |
| Apr 16, 2010 | DR-1899-NY | DR | Severe Storm | Severe Storms And Flooding |
| Dec 31, 2009 | DR-1869-NY | DR | Severe Storm | Severe Storms And Flooding Assoc W Td Ida & Nor'Easter |
| Sep 30, 2005 | EM-3262-NY | EM | Hurricane | Hurricane Katrina Evacuation |
| Aug 3, 2004 | DR-1534-NY | DR | Severe Storm | Severe Storms And Flooding |
| Aug 23, 2003 | EM-3186-NY | EM | Other | Power Outage |
| Mar 27, 2003 | EM-3184-NY | EM | Snowstorm | Snow |
| Sep 11, 2001 | DR-1391-NY | DR | Fire | Fires And Explosions |
| Oct 11, 2000 | EM-3155-NY | EM | Other | West Nile Virus |
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 New York'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.
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.