Hillsborough County, New Hampshire: hazard history

FEMA declared 31 disasters that named Hillsborough County between 1973 and 2020.

Most recent declarations

• EM-3445 2020 · Biological · Covid-19
• DR-4516 2020 · Biological · Covid-19 Pandemic
• DR-4209 2015 · Severe Storm · Severe Winter Storm And Snowstorm
• DR-4105 2013 · Severe Storm · Severe Winter Storm And Snowstorm
• EM-3360 2012 · Hurricane · Hurricane Sandy
• DR-4049 2011 · Severe Storm · Severe Storm And Snowstorm
• EM-3344 2011 · Severe Storm · Severe Storm
• EM-3333 2011 · Hurricane · Hurricane Irene
• DR-1913 2010 · Severe Storm · Severe Storms And Flooding
• DR-1892 2010 · Severe Storm · Severe Winter Storm

Not counted above: 1 statewide declarations, which covered every county in New Hampshire. A declaration is a decision to send federal help, not a measure of how bad an event was. Records run from 1953. Source: FEMA OpenFEMA Disaster Declarations Summaries.

Records start in 1996. Damage is NOAA's estimate at the time, in nominal dollars, and is often rounded; it is not insurance claims data. A storm that crossed two NOAA zones in this county is recorded, and counted, once per zone. A storm filed against a forecast zone is counted in every county that zone covers, with the whole storm's damage; do not add these figures across counties.

NOAA storm event records in Hillsborough County each year. The busiest year was 2022, with 47 records.

Years with no record are left out of the table, not shown as zero.

Costliest records

1. Ice Storm · Dec 11, 2008$15.0M
   NOAA name: NWS forecast zone · NOAA record 146824
2. Ice Storm · Dec 11, 2008$12.0M
   NOAA name: NWS forecast zone · NOAA record 146825
3. Heavy Snow · Mar 5, 2001$5.0M
   NOAA name: NWS forecast zone · NOAA record 5237888
4. High Wind · Feb 25, 2010$2.5M
   NOAA name: NWS forecast zone · NOAA record 215305
5. Flood · May 13, 2006$2.0M
   NOAA name: Hillsborough County · NOAA record 5513528

Deadliest records

1. High Wind · Nov 29, 20032 deaths
   NOAA name: NWS forecast zone · $25K damage · 2 injuries · NOAA record 5336514
2. Heavy Snow · Dec 7, 19961 death
   NOAA name: NWS forecast zone · $1.0M damage · NOAA record 5582379
3. Thunderstorm Wind · Jul 6, 19991 death
   NOAA name: Hillsborough County · NOAA record 5710652
4. Heavy Snow · Dec 16, 20071 death
   NOAA name: NWS forecast zone · NOAA record 70993
5. Strong Wind · Oct 31, 20091 death
   NOAA name: NWS forecast zone · NOAA record 196466

Each line is one NOAA record, linked to its page at NOAA. One large storm can appear more than once if NOAA recorded it in several zones of this county. Dollars are nominal.

The National Flood Insurance Program paid $9.7M on 626 claims in Hillsborough County from 1978 to 2024.

A count of claims, not a rate: NFIP publishes no count of insured homes beside it, and most flood damage is uninsured. Nominal dollars. Records run from 1978 to 2024; claims filed without a county code are not on any county page. Source: FEMA OpenFEMA FIMA NFIP Redacted Claims.

A hazard vulnerability analysis rates each hazard for probability, impact, preparedness and response. Probability is the one column the county’s federal record can fill — NCEI storm events from 1996 to 2026 and FEMA declarations naming the county — and this is what it says for a facility here, on the 0–3 scale of the all-hazards structure surveyors expect. The other six columns are the facility’s own judgment about its building, and Calchis leaves them blank.

A dash means the record does not speak to that hazard; it is not a zero. Whether a finished document satisfies the CMS Emergency Preparedness Rule is the facility’s finding and its surveyor’s. Complete the HVA for a facility in Hillsborough County — the technological, human and hazardous-materials rows, the six facility columns, the approval and the printed document — or read the sample analysis on that page first.

• Every figure is counted from public federal records held by Calchis: NOAA NCEI Storm Events, FEMA OpenFEMA Disaster Declarations, and FEMA NFIP claims. Nothing is modeled or estimated.
• NOAA files some events against a county and others against an NWS forecast zone, and publishes a code for both. Records are counted as Hillsborough County by that code — county records by the county's own FIPS code, zone records through the National Weather Service's published list of which counties each zone covers. No name matching is involved. Of 793 records, 443 were filed against this county and 350 against a forecast zone covering it. A zone storm is counted in every county its zone covers, and its damage figure is the whole storm's, not this county's share — NOAA does not publish that split. So these figures describe this county; they must not be added up across counties.
• Counts last rebuilt from the source records on Sep 15, 2026.