Summary
Plan status as of 2026-09-30: No county-level plan row in FEMA data.
Highest expected annual loss (FEMA National Risk Index, modeled total; see B1-a): Inland Flooding ($71,359,326 a year), Coastal Flooding ($14,336,053) and Hurricane ($11,288,030).
The tables that follow are organized by the items of FEMA's Local Mitigation Plan Review Tool, Element B (B1-a to B2-c); each heading says which item its tables support.
Plan clock
No county-level plan row in FEMA data
What changed since your last plan
Not available. No county-level plan row in FEMA data, so there is no approval date to count from.
Sources: 1, 2, 4, 6 (numbered list at the end)
Plan status for every jurisdiction listed in this county: 27 rows, in the section "Plan clock: Plan status for every jurisdiction listed in this county" on the following pages.
State plan status and tribal plans in this state: see the state page.
Plan clock
Plan status for every jurisdiction listed in this county
Source: 1
| Jurisdiction | Type | Status | Plan | Approved | Expires | Days to expirynegative = days since expiry | Notes |
|---|---|---|---|---|---|---|---|
| Bridgewater Town city | Town | Approved, expires 2027-08-10 | Town of Bridgewater, MA Hazard Mitigation Plan (FEMA plan 108263) | 2022-08-11 | 2027-08-10 | 314 | |
| Brockton city | City | Approved, expires 2027-12-13 | Brockton Natural Hazard Mitigation Plan (FEMA plan 108309) | 2022-12-14 | 2027-12-13 | 439 | this jurisdiction approved 2022-12-09 |
| Abington town | Town | Approved, expires 2030-02-11 | Towns of Abington, Easton, and Stoughton Natural Hazard Mitigation Plan 2023 Update (FEMA plan 109886) | 2025-02-12 | 2030-02-11 | 1,230 | |
| Carver town | Town | Approved, expires 2027-06-29 | Town of Carver Hazard Mitigation Plan 2022 (FEMA plan 108233) | 2022-06-30 | 2027-06-29 | 272 | |
| Duxbury town | Town | Expired on 2024-01-08 | Town of Duxbury Hazard Mitigation Plan 2018 (FEMA plan 105478) | 2019-01-09 | 2024-01-08 | -996 | |
| East Bridgewater town | Town | Expired on 2020-11-12 | Natural Hazard Mitigation Plan for the Old Colony Region May 2015 (FEMA plan 11350) | 2015-11-12 | 2020-11-12 | -2,148 | |
| Halifax town | Town | Approved, expires 2027-02-13 | Town of Halifax, Massachusetts Integrated Municipal Vulnerability Preparedness and Hazard Mitigation Plan (MVP-HMP) (FEMA plan 107718) | 2022-02-14 | 2027-02-13 | 136 | |
| Hanover town | Town | Approved, expires 2030-04-15 | Town of Hanover Hazard Mitigation Plan 2024 Update (FEMA plan 109762) | 2025-04-16 | 2030-04-15 | 1,293 | |
| Hanson town | Town | Approved, expires 2027-01-03 | Town of Hanson, Massachusetts Integrated Municipal Vulnerability Preparedness and Hazard Mitigation Plan (MVP-HMP) (FEMA plan 107611) | 2022-01-04 | 2027-01-03 | 95 | |
| Hingham town | Town | Approved, expires 2027-07-10 | Town of Hingham Hazard Mitigation Plan 2022 Update (FEMA plan 108265) | 2022-07-11 | 2027-07-10 | 283 | |
| Hull town | Town | Approved, expires 2029-09-12 | Town of Hull Hazard Mitigation Plan 2024 Update (FEMA plan 109990) | 2024-09-13 | 2029-09-12 | 1,078 | |
| Kingston town | Town | Approved, expires 2027-09-01 | Hazard Mitigation Plan, Kingston, Massachusetts 2022 (FEMA plan 108388) | 2022-09-02 | 2027-09-01 | 336 | |
| Lakeville town | Town | Approved, expires 2027-09-11 | Town of Lakeville Natural Hazard Mitigation Plan 2022 (FEMA plan 108327) | 2022-09-12 | 2027-09-11 | 346 | |
| Marion town | Town | Approved, expires 2027-01-10 | Marion Multi-Hazard Mitigation Plan (FEMA plan 107875) | 2022-01-11 | 2027-01-10 | 102 | |
| Marshfield town | Town | Approved, expires 2028-12-12 | Marshfield Multi-Hazard Mitigation Plan (FEMA plan 109126) | 2023-12-13 | 2028-12-12 | 804 | |
| Mattapoisett town | Town | Approved, expires 2031-01-29 | Town of Mattapoisett Multi-Hazard Mitigation Plan (FEMA plan 110853) | 2026-01-30 | 2031-01-29 | 1,582 | |
| Middleborough town | Town | Approved, expires 2029-04-11 | Town of Middleborough, MA Hazard Mitigation Plan Update (FEMA plan 109353) | 2024-04-12 | 2029-04-11 | 924 | |
| Norwell town | Town | Expired on 2025-12-03 | Town of Norwell Hazard Mitigation Plan 2020 Update (FEMA plan 106750) | 2020-12-04 | 2025-12-03 | -301 | |
| Pembroke town | Town | Approved, expires 2028-02-15 | Town of Pembroke, MA Municipal Vulnerability & Hazard Mitigation Plan (FEMA plan 108293) | 2023-02-16 | 2028-02-15 | 503 | |
| Plymouth town | Town | Approved, expires 2026-12-15 | 2021 Hazard Mitigation Plan Plymouth, Massachusetts (FEMA plan 107852) | 2021-12-16 | 2026-12-15 | 76 | |
| Plympton town | Town | Approved, expires 2026-12-07 | Plympton Multi-Hazard Mitigation Plan (FEMA plan 107804) | 2021-12-08 | 2026-12-07 | 68 | |
| Rochester town | Town | Approved, expires 2030-07-20 | 2024 Hazard Mitigation Plan, Rochester, Massachusetts (FEMA plan 110257) | 2025-07-21 | 2030-07-20 | 1,389 | |
| Rockland town | Town | Expired on 2024-08-26 | Town of Rockland Hazard Mitigation Plan (FEMA plan 105857) | 2019-08-27 | 2024-08-26 | -765 | |
| Scituate town | Town | Approved, expires 2027-06-29 | 2022 Scituate, MA Hazard Mitigation Plan (FEMA plan 108287) | 2022-06-30 | 2027-06-29 | 272 | |
| Wareham town | Town | Expired on 2025-12-20 | Wareham Multi-Hazard Mitigation Plan (FEMA plan 106824) | 2020-12-21 | 2025-12-20 | -284 | |
| West Bridgewater town | Town | Approved, expires 2027-11-01 | Town of West Bridgewater Multi-Hazard Mitigation Plan (FEMA plan 108481) | 2022-11-02 | 2027-11-01 | 397 | |
| Whitman town | Town | Approved, expires 2027-01-06 | Town of Whitman, Massachusetts Integrated Municipal Vulnerability Preparedness and Hazard Mitigation Plan (MVP-HMP) (FEMA plan 107717) | 2022-01-07 | 2027-01-06 | 98 |
Supports FEMA checklist item B1-a: hazard identification
Hazards NRI does not cover (local data needed)
- dam failure (incl. upstream dams)
- levee failure
- flash flood as its own subtype
- ice jams
- debris flows
- erosion (riverine and coastal)
- land subsidence and sinkholes
- expansive soils
The 18 National Risk Index hazards, ranked by expected annual loss (EAL)
Sources: 5, 6
| Rank by EAL | Hazard | NRI risk rating | EAL rating | EAL buildingsmodeled dollars per year | EAL agriculturemodeled dollars per year | Cost of expected deaths and injuriesFEMA's dollar value per year, not property damage | EAL total (see note)modeled dollars per year | Storm Events records, 1996 to 2026-06-30count | Storm Events coverage note |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Inland Flooding | Relatively Moderate | Relatively High | $70,400,283 | $497,798 | $461,245 | $71,359,326 | 81 | |
| 2 | Coastal Flooding | Very High | Very High | $14,314,229 | n/a | $21,828 | $14,336,053 | 65 | |
| 3 | Hurricane | Relatively Moderate | Relatively High | $10,245,702 | $721,624 | $320,704 | $11,288,030 | 6 | |
| 4 | Earthquake | Relatively Low | Relatively Moderate | $4,080,048 | n/a | $779,549 | $4,859,597 | Storm Events does not record earthquakes. | |
| 5 | Strong Wind | Relatively High | Relatively High | $1,214,583 | $200 | $1,987,355 | $3,202,139 | 457 | Includes 105 High Wind and 175 Strong Wind records (NOAA non-thunderstorm wind types, outside NRI's Strong Wind definition). |
| 6 | Heat Wave | Relatively Moderate | Relatively Moderate | $3 | $11,003 | $2,535,218 | $2,546,224 | 3 | |
| 7 | Cold Wave | Relatively Low | Relatively Moderate | $1,293 | $7,725 | $1,975,106 | $1,984,124 | 2 | |
| 8 | Lightning | Relatively High | Relatively High | $82,283 | n/a | $1,565,714 | $1,647,997 | 45 | |
| 9 | Tornado | Relatively Low | Relatively Low | $1,319,957 | $661 | $220,789 | $1,541,407 | 3 | |
| 10 | Drought | Relatively Moderate | Relatively Moderate | n/a | $690,039 | n/a | $690,039 | 8 | |
| 11 | Ice Storm | Relatively High | Relatively High | $620,728 | n/a | $69,107 | $689,835 | 0 | No recorded events in Storm Events since 1996 (data through 2026-06-30). |
| 12 | Wildfire | Very Low | Very Low | $69,236 | $12 | $8,268 | $77,516 | 0 | No recorded events in Storm Events since 1996 (data through 2026-06-30). |
| 13 | Winter Weather | Relatively Low | Relatively Low | $39,578 | $31 | $20,133 | $59,742 | 119 | |
| 14 | Hail | Very Low | Very Low | $19,303 | $224 | $7,457 | $26,985 | 77 | |
| 15 | Landslide | Very Low | Very Low | $3,400 | n/a | $566 | $3,966 | 0 | No recorded events in Storm Events since 1996 (data through 2026-06-30). |
| Tsunami | Insufficient Data | Insufficient Data | n/a | n/a | n/a | n/a | 0 | No recorded events in Storm Events since 1996 (data through 2026-06-30). |
Total = buildings + agriculture + population equivalence; FEMA values each expected death (or 10 injuries) at $13.7 million (2024 dollars).
NRI risk rating combines expected annual loss with social vulnerability and community resilience; EAL rating rates expected annual loss alone. Both compare this county with all U.S. counties.
Local data needed: state and local wildfire, landslide and tsunami records (Storm Events records these hazards only in part).
Not applicable to this county per NRI, with no federal declaration and no Storm Events record since 1996: avalanche and volcanic activity. That is the evidence for leaving them out of the plan.
The state hazard mitigation plan also lists hazards for this county; FEMA asks the plan to explain any hazard it leaves out.
Supports FEMA checklist item B1-b: hazard location
Affects the whole county (national data give no location within it): Cold Wave, Drought, Hail, Heat Wave, Ice Storm, Lightning, Strong Wind and Winter Weather.
Coastal Flooding and Inland Flooding: The FEMA Flood Insurance Rate Map (FIRM) is the required location source for flooding. See the FEMA Flood Map Service Center (https://msc.fema.gov) for this county.
Hazards that vary within the county: highest-rated census tracts
Source: 5
| Hazard | Highest-rated census tractsNRI risk rating, score 0 to 100 |
|---|---|
| Earthquake | tract 9803 (Relatively Moderate, 80.3); tract 5012.04 (Relatively Moderate, 78.0); tract 5041.01 (Relatively Low, 74.7) |
| Hurricane | tract 5411 (Relatively Moderate, 83.4); tract 5422 (Relatively Moderate, 83.1); tract 5012.04 (Relatively Moderate, 83.0) |
| Landslide | tract 5307 (Relatively Low, 91.8); tract 5306 (Relatively Low, 89.7); tract 5308.01 (Relatively Low, 82.5) |
| Tornado | tract 5011.02 (Relatively Low, 38.6); tract 5012.04 (Relatively Low, 37.3); tract 5041.01 (Relatively Low, 35.4) |
| Tsunami | no tract has a National Risk Index rating for this hazard |
| Wildfire | tract 5071.01 (Relatively Low, 77.2); tract 5061.02 (Relatively Low, 75.9); tract 5041.02 (Relatively Low, 75.0) |
Up to 3 census tracts per hazard, highest National Risk Index rating first, then highest score; a tract number is the Census tract number (for example 9803 is Census Tract 9803). FEMA's Resilience Analysis and Planning Tool maps the National Risk Index for every tract: https://www.fema.gov/emergency-managers/practitioners/resilience-analysis-and-planning-tool
Supports FEMA checklist item B1-c: hazard extent
Extent: scale, observed range and worst recorded event per hazard
Sources: 6, 7
| Hazard | Scale | Recordscount and years | Observed range | Worst recorded event | Most damaging (when different) | How it applies to jurisdictions | Note |
|---|---|---|---|---|---|---|---|
| Coastal Flood, Storm Surge/Tide | none in data (flood depth: FIRM) | 65 records, 1997 to 2024 (64 zone-level) | Coastal Flood, 2013-02-09, $9,200,000 property; $0 crops (2013 dollars); NWS zone MAZ019 | Event records naming jurisdictions in the plan: Hingham town (1 record). Zone-level records (64) apply countywide. | Flood depth: see the FEMA Flood Insurance Rate Map. | ||
| Cold/Wind Chill, Extreme Cold/Wind Chill | wind chill | 2 records, 2015 to 2016 (2 zone-level) | 1 day; 2 with a recorded value | 1 consecutive day, 2016-02-14, zone-level | Countywide (zone-level records). | ||
| Frost/Freeze (outside NRI's Cold Wave definition) | crop damage | 0 | |||||
| Drought | U.S. Drought Monitor scale (D0 to D4) | 8 records, 2012 to 2017 (8 zone-level) | 34 days to 155 days (median 94.5 days); 2 with a recorded value | 155 days (about 5.1 months), 2016-08-23 to 2017-01-24, a run of 6 consecutive Storm Events drought records, zone-level | Countywide (zone-level records). | Storm Events enters a drought at D2 or worse east of the Rockies and D3 or worse from the Rockies west (NWS Instruction 10-1605); NRI drought counts D3 and D4 only. | |
| Earthquake | Modified Mercalli (local data) | 0 | Storm Events does not record earthquakes; the USGS earthquake catalog is the source. | ||||
| Hail | hail size (inches) | 82 records, 1959 to 2025 | 0.75 in to 2.75 in (median 1 in); 82 with a recorded value | 2.75 in hail, 1999-07-06 | Hail, 2004-07-02, $35,000 property; crops not reported (2004 dollars) | Event records naming jurisdictions in the plan: Plymouth town (13 records), Brockton city (8 records), Duxbury town (4 records), Scituate town (4 records), Whitman town (4 records), Abington town (3 records), Rockland town (3 records), West Bridgewater town (3 records), Carver town (2 records), Halifax town (2 records); and 14 more jurisdictions (see the Excel file). | |
| Excessive Heat, Heat | heat index (in event narratives) | 3 records, 2010 to 2018 (3 zone-level) | 1 day; 3 with a recorded value | 1 consecutive day, 2018-07-03, zone-level | Countywide (zone-level records). | ||
| Hurricane, Tropical Storm, Tropical Depression | Saffir-Simpson | 6 records, 2008 to 2021 (6 zone-level) | Strongest recorded: Tropical Storm record, 2011-08-28, $1,600,000 property; $0 crops (2011 dollars); NWS zone MAZ018 | Countywide (zone-level records). | Storm Events files every zone of a storm's episode under the storm's type; flooding from the storm is filed as Flood or Flash Flood records. | ||
| Ice Storm | Sperry-Piltz ice scale (local data) | 0 | |||||
| Flash Flood, Flood, Lakeshore Flood | damage and flood days (flood depth: FIRM) | 81 records, 1996 to 2025 (5 zone-level) | Flood, 2010-03-14, $16,150,000 property; $0 crops (2010 dollars) | Event records naming jurisdictions in the plan: Hingham town (8 records), Plymouth town (7 records), Marion town (6 records), Brockton city (4 records), Kingston town (3 records), Wareham town (3 records), Whitman town (2 records), Carver town (1 record), East Bridgewater town (1 record), Hanover town (1 record); and 2 more jurisdictions (see the Excel file). Zone-level records (5) apply countywide. | Flood depth: see the FEMA Flood Insurance Rate Map. Storm Events damage is often $0 or blank for floods, major ones included; FEMA Public Assistance by declaration (B1-d) shows which floods cost the most. | ||
| Debris Flow | none (count and damage only) | 0 | |||||
| Lightning | annualized frequency (the measure FEMA's Local Mitigation Planning Handbook names) | 45 records, 1996 to 2024 | Lightning, 2010-09-08, $0 property; $0 crops (2010 dollars), 1 direct death | Lightning, 2014-10-08, $300,000 property; $0 crops (2014 dollars) | Event records naming jurisdictions in the plan: Hingham town (4 records), Plymouth town (4 records), Brockton city (3 records), Halifax town (3 records), Duxbury town (2 records), Hanover town (2 records), Whitman town (2 records), East Bridgewater town (1 record), Hanson town (1 record), Hull town (1 record); and 9 more jurisdictions (see the Excel file). | Storm Events lists lightning with damage or casualties. | |
| High Wind and Strong Wind (outside NRI's Strong Wind definition) | wind speed (kt and mph) | 280 records, 1996 to 2025 (280 zone-level) | 26 kt (30 mph) to 76 kt (87 mph) (median 48 kt (55 mph)); 216 with a recorded value | 76 kt (87 mph) measured gust, High Wind, 2021-10-26; NWS zone MAZ019 | Countywide (zone-level records). | ||
| Thunderstorm Wind | wind speed (kt and mph) | 197 records, 1961 to 2025 | 40 kt (46 mph) to 90 kt (104 mph) (median 50 kt (58 mph)); 181 with a recorded value | 90 kt (104 mph), measurement type not recorded, Thunderstorm Wind, 1997-06-22, 1 direct death; same speed and measurement basis also recorded on 1996-05-21 | Thunderstorm Wind, 1996-05-21, $4,000,000 property; crops not reported (1996 dollars) | Event records naming jurisdictions in the plan: Hingham town (21 records), Plymouth town (10 records), Brockton city (8 records), Whitman town (7 records), Duxbury town (6 records), Pembroke town (6 records), Scituate town (6 records), Halifax town (5 records), Rochester town (5 records), Abington town (3 records); and 11 more jurisdictions (see the Excel file). | |
| Tornado | Enhanced Fujita (Fujita before Feb 2007) | 10 records, 1958 to 2023 | F/EF0 to F/EF2 (median between F/EF0 and F/EF1); 10 with a recorded value | F2 tornado, 1967-11-18, 0.1 mi path length (whole path, pre-1996), 17 yd wide, $250 property; crops not recorded (1967 dollars) | Tornado, 1986-09-16, $250,000 property; crops not recorded (1986 dollars) | Event records naming jurisdictions in the plan: Plymouth town (1 record). | Before 1996 a tornado is listed once, under the county where it began, with its whole path's rating and length; from 1996 on, each county lists its own segment. Length is not used to rank tornadoes (see Methods). |
| Tsunami | none (count and damage only) | 0 | |||||
| Wildfire | acres burned (local data) | 0 | |||||
| Winter Storm, Heavy Snow, Blizzard, Lake-Effect Snow, Winter Weather, Sleet | none in data (snowfall: local data) | 119 records, 1996 to 2026 (119 zone-level) | Heavy Snow, 1997-04-01, $2,500,000 property; crops not reported (1997 dollars); NWS zone MAZ018 | Countywide (zone-level records). |
Where a hazard names more than 10 jurisdictions, the table lists the 10 with the most records; every one is in the Excel file, sheet "B1-c Extent".
In event narratives only (local data needed): wind chill, temperature, heat index, ice thickness, acres burned and snow depth; any physical measure of debris flow, lightning and tsunami.
Storm Events records are more complete after 1996; before 1996 only Tornado (from 1950), Hail and Thunderstorm Wind (from 1955) exist. Zone-level records from zones that no NWS zone-county file places in this county (mostly before 2020) are not counted here (the Methods page explains the zone matching).
Dollars are nominal (as reported), labeled with the year; not adjusted for inflation.
Supports FEMA checklist item B1-d: previous occurrences
Federal declarations for this county: 32 declarations covering 25 separate hazard incidents counted in this packet (declarations for the same incident count once; non-natural and evacuation-only declarations are not counted).
No county-level plan row in FEMA data, so there is no approval date to count from.
Federal disaster declarations for this county
Sources: 1, 2, 3
| Declared | Incident began | FEMA number | Type | Title | Mapped hazard | County Public Assistancefederal share obligated, nominal dollars | Flags | Notes |
|---|---|---|---|---|---|---|---|---|
| 2023-09-15 | 2023-09-15 | EM-3599-MA | Emergency | Hurricane Lee | Hurricane | $2,954.08 | within last 5 years | |
| 2022-04-18 | 2022-01-28 | DR-4651-MA | Major disaster | Severe Winter Storm and Snowstorm | Winter Weather | $3,346,871.88 | within last 5 years | |
| 2020-03-27 | 2020-01-20 | DR-4496-MA | Major disaster | COVID-19 Pandemic | Non-natural, not counted | $26,700,364.80 | ||
| 2020-03-13 | 2020-01-20 | EM-3438-MA | Emergency | COVID-19 | Non-natural, not counted | no Public Assistance recorded | same incident as DR-4496 | |
| 2018-06-25 | 2018-03-02 | DR-4372-MA | Major disaster | Severe Winter Storm and Flooding | Inland Flooding; Winter Weather | $12,430,409.86 | ||
| 2015-04-13 | 2015-01-26 | DR-4214-MA | Major disaster | Severe Winter Storm, Snowstorm, and Flooding | Inland Flooding; Winter Weather | $8,118,237.20 | ||
| 2013-04-19 | 2013-02-08 | DR-4110-MA | Major disaster | Severe Winter Storm, Snowstorm, and Flooding | Inland Flooding; Winter Weather | $5,327,481.26 | ||
| 2012-12-19 | 2012-10-27 | DR-4097-MA | Major disaster | Hurricane Sandy | Hurricane | $1,268,254.30 | ||
| 2012-10-28 | 2012-10-27 | EM-3350-MA | Emergency | Hurricane Sandy | Hurricane | no Public Assistance recorded | same incident as DR-4097 | |
| 2011-09-03 | 2011-08-27 | DR-4028-MA | Major disaster | Tropical Storm Irene | Hurricane | $2,074,590.38 | ||
| 2011-08-26 | 2011-08-26 | EM-3330-MA | Emergency | Hurricane Irene | Hurricane | no Public Assistance recorded | same incident as DR-4028 | |
| 2010-09-02 | 2010-09-01 | EM-3315-MA | Emergency | Hurricane Earl | Hurricane | $108,710.03 | ||
| 2010-03-29 | 2010-03-12 | DR-1895-MA | Major disaster | Severe Storms and Flooding | Inland Flooding | $975,580.21 | ||
| 2007-05-16 | 2007-04-15 | DR-1701-MA | Major disaster | Severe Storms and Inland and Coastal Flooding | Coastal Flooding | $1,322,878.28 | ||
| 2005-11-10 | 2005-10-07 | DR-1614-MA | Major disaster | Severe Storms and Flooding | Inland Flooding | PA not declared for this county | ||
| 2005-09-13 | 2005-08-29 | EM-3252-MA | Emergency | Hurricane Katrina Evacuation | Hurricane: evacuation support, not a local hazard event; not counted | $11,866.36 | ||
| 2005-02-17 | 2005-01-22 | EM-3201-MA | Emergency | Record and/or Near Record Snow | Winter Weather | $3,169,511.85 | ||
| 2004-01-15 | 2003-12-06 | EM-3191-MA | Emergency | Snow | Winter Weather | $1,816,405.45 | ||
| 2003-03-11 | 2003-02-17 | EM-3175-MA | Emergency | Snow | Winter Weather | $1,677,017.59 | ||
| 2001-04-10 | 2001-03-05 | DR-1364-MA | Major disaster | Severe Storms and Flooding | Inland Flooding | PA not declared for this county | ||
| 1998-06-23 | 1998-06-13 | DR-1224-MA | Major disaster | Heavy Rains and Flooding | Inland Flooding | PA not declared for this county | ||
| 1996-10-25 | 1996-10-20 | DR-1142-MA | Major disaster | Extreme Weather Conditons and Flooding | Inland Flooding | no Public Assistance recorded | ||
| 1996-10-23 | 1996-10-20 | EM-3119-MA | Emergency | Extreme Weather Conditions and Flooding | Inland Flooding | no Public Assistance recorded | same incident as DR-1142 | |
| 1996-01-24 | 1996-01-07 | DR-1090-MA | Major disaster | Blizzard of 96 | Winter Weather | no Public Assistance recorded | ||
| 1993-03-16 | 1993-03-13 | EM-3103-MA | Emergency | Blizzards, High Winds & Record Snowfall | Winter Weather | no Public Assistance recorded | ||
| 1992-12-21 | 1992-12-11 | DR-975-MA | Major disaster | Winter Coastal Storm | Coastal Flooding | no Public Assistance recorded | ||
| 1991-11-04 | 1991-10-30 | DR-920-MA | Major disaster | Coastal Storm | Coastal Flooding | no Public Assistance recorded | ||
| 1991-08-26 | 1991-08-19 | DR-914-MA | Major disaster | Hurricane Bob | Hurricane | no Public Assistance recorded | ||
| 1985-10-28 | 1985-09-27 | DR-751-MA | Major disaster | Hurricane Gloria | Hurricane | no Public Assistance recorded | ||
| 1978-02-10 | 1978-02-06 | DR-546-MA | Major disaster | Coastal Storms, Flood, Ice & Snow | Coastal Flooding | no Public Assistance recorded | ||
| 1972-09-28 | 1972-09-28 | DR-357-MA | Major disaster | Toxic Algae in Coastal Waters | Fishing Losses: economic loss, not a physical hazard event; non-natural, not counted | PA not declared for this county | ||
| 1972-03-06 | 1972-03-06 | DR-325-MA | Major disaster | Severe Storms & Flooding | Inland Flooding | no Public Assistance recorded |
County Public Assistance: applicants the FEMA record places in this county, including any state agencies FEMA files there; statewide rows are listed on the state page; federal share obligated, nominal dollars.
Statewide declarations
Source: 2
| Declared | Incident began | FEMA number | Type | Title | Mapped hazard |
|---|---|---|---|---|---|
| 1955-08-20 | 1955-08-20 | DR-43-MA | Major disaster | Hurricane & Floods | Hurricane (primary); also designated: Inland Flooding |
| 1954-09-02 | 1954-09-02 | DR-22-MA | Major disaster | Hurricanes | Hurricane (primary); also designated: Inland Flooding |
| 1953-06-11 | 1953-06-11 | DR-7-MA | Major disaster | Tornado | Tornado |
FEMA recorded these with designated area Statewide and no county, so they are listed on every county page in the state and not counted with county rows. Local data needed: whether each one affected this county.
1 Fire Management declaration (1995-09-12 to 1995-09-12) FEMA filed as Statewide with no county; each names one local fire. Listed on the state page.
Previous occurrences by hazard, with explicit no-event rows
Sources: 2, 6, 7
| Hazard | Storm Events records, all years on file(years in the Period column) | Since plan approvalrecords | In the 12 months before plan approvalrecords | Last 5 yearsrecords | Declared incidents, all yearsseparate disasters | Declared since approvalseparate disasters | Period | Statement |
|---|---|---|---|---|---|---|---|---|
| Coastal Flooding | 65 | 10 | 4 | 1996 to 2026-06-30 | ||||
| Cold Wave | 2 | 0 | 0 | 1996 to 2026-06-30 | ||||
| Drought | 8 | 0 | 0 | 1996 to 2026-06-30 | ||||
| Earthquake | 0 | 0 | 0 | Storm Events does not record earthquakes; the USGS earthquake catalog is the source. | ||||
| Hail | 82 | 6 | 0 | 1955 to 2026-06-30 | ||||
| Heat Wave | 3 | 0 | 0 | 1996 to 2026-06-30 | ||||
| Hurricane | 6 | 0 | 6 | 1996 to 2026-06-30 | ||||
| Ice Storm | 0 | 0 | 0 | 1996 to 2026-06-30 | No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events | |||
| Inland Flooding | 81 | 10 | 9 | 1996 to 2026-06-30 | ||||
| Landslide | 0 | 0 | 0 | 1996 to 2026-06-30 | No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events | |||
| Lightning | 45 | 4 | 0 | 1996 to 2026-06-30 | ||||
| Strong Wind | 477 | 65 | 0 | 1955 to 2026-06-30 | Includes 105 High Wind and 175 Strong Wind records. | |||
| Tornado | 10 | 1 | 0 | 1950 to 2026-06-30 | ||||
| Tsunami | 0 | 0 | 0 | 1996 to 2026-06-30 | No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events | |||
| Wildfire | 0 | 0 | 0 | 1996 to 2026-06-30 | No recorded events, 1996 to 2026-06-30, NOAA NCEI Storm Events | |||
| Winter Weather | 119 | 8 | 9 | 1996 to 2026-06-30 |
Notable Storm Events records
Sources: 1, 6, 7
| Date | Event type | Magnitude or extent | Damagenominal dollars | Deaths, injuriesdirect only | Location | Flags | Why listed |
|---|---|---|---|---|---|---|---|
| 2023-12-18 | Strong Wind | 43 kt (49 mph) measured gust | $0 property; $0 crops (zone total, 2023 dollars) | 1, 0 | NWS zone MAZ018 (WESTERN PLYMOUTH), zone-level | within last 5 years | deaths or injuries recorded |
| 2021-10-26 | High Wind | 76 kt (87 mph) measured gust | $1,660,000 property; $0 crops (zone total, 2021 dollars) | 0, 0 | NWS zone MAZ019 (EASTERN PLYMOUTH), zone-level | within last 5 years | B1-c worst recorded: High Wind and Strong Wind |
| 2018-07-03 | Excessive Heat | $0 property; $0 crops (zone total, 2018 dollars) | 0, 0 | NWS zone MAZ019 (EASTERN PLYMOUTH), zone-level | B1-c worst recorded: Excessive Heat, Heat | ||
| 2016-04-03 | Strong Wind | 43 kt (49 mph) estimated gust | $15,000 property; $0 crops (zone total, 2016 dollars) | 2, 0 | NWS zone MAZ018 (WESTERN PLYMOUTH), zone-level | deaths or injuries recorded | |
| 2016-02-14 | Extreme Cold/Wind Chill | $0 property; $0 crops (zone total, 2016 dollars) | 0, 0 | NWS zone MAZ019 (EASTERN PLYMOUTH), zone-level | B1-c worst recorded: Cold/Wind Chill, Extreme Cold/Wind Chill | ||
| 2013-02-09 | Coastal Flood | $9,200,000 property; $0 crops (zone total, 2013 dollars) | 0, 0 | NWS zone MAZ019 (EASTERN PLYMOUTH), zone-level | B1-c worst recorded: Coastal Flood, Storm Surge/Tide | ||
| 2011-08-28 | Tropical Storm | $1,600,000 property; $0 crops (zone total, 2011 dollars) | 0, 0 | NWS zone MAZ018 (WESTERN PLYMOUTH), zone-level | B1-c worst recorded: Hurricane, Tropical Storm, Tropical Depression | ||
| 2010-09-08 | Lightning | $0 property; $0 crops (2010 dollars) | 1, 0 | PLYMOUTH | B1-c worst recorded: Lightning | ||
| 2010-03-14 | Flood | $16,150,000 property; $0 crops (2010 dollars) | 0, 0 | HANOVER to COCHESETT | B1-c worst recorded: Flash Flood, Flood, Lakeshore Flood | ||
| 1997-06-22 | Thunderstorm Wind | 90 kt (104 mph), measurement type not recorded | damage not reported | 1, 0 | HULL | B1-c worst recorded: Thunderstorm Wind | |
| 1967-11-18 | Tornado | F2, 0.1 mi path length (whole path, pre-1996), 17 yd wide | $250 property; crops not recorded (1967 dollars) | 0, 0 | location not recorded | B1-c worst recorded: Tornado | |
| 1958-09-07 | Tornado | F0, 33 yd wide | $2,500 property; crops not recorded (1958 dollars) | 1, 1 | location not recorded | deaths or injuries recorded |
The full list is in the Excel file, sheet "B1-d Storm Events history" (898 rows).
Location is the place NOAA recorded, as written in its data; it need not be a jurisdiction in this plan.
Local data needed: state-declared emergencies, from your state emergency management agency (federal data do not include them).
Tribal and special-area declarations in this state are listed on the state page.
Supports FEMA checklist item B1-e: probability of future events
Probability: FEMA annualized frequency and descriptor per hazard
Sources: 5, 6
| Hazard | FEMA annualized frequency (modeled)unit per row | Unit | In plain terms | Descriptor | Descriptor basis | NRI events or days in its record period (hail, wind and tornado are area-weighted, so can be fractional) | NRI period | Location | Note |
|---|---|---|---|---|---|---|---|---|---|
| Coastal Flooding | 7.14 | events per year at a location (modeled) | about 7.1 per year at a given location in the county | Highly likely | FEMA annualized frequency (modeled) | not shown | modeled | see B1-f | Descriptor from NRI: the rate at a location is 1 or more a year, so the county rate is at least that. |
| Cold Wave | 1.03 | event-days per year | about 1.03 days per year | Possible | Storm Events event-days in 2 of 30 years, 1996 to 2025 (6.67%) | 12.4 | 2005-11-12 to 2024-11-12 (19 years) | countywide | |
| Drought | 3.15 | event-days per year | about 3.15 days per year | Likely | Storm Events event-days in 3 of 30 years, 1996 to 2025 (10%) | 203 | 2000 to 2025 (25.25 years; D3 and D4 only) | countywide | |
| Earthquake | 0.00145 | annual probability at a location | chance a given location in the county has at least minor-damage shaking in a year: 0.145% | not shown | modeled | see B1-f | No descriptor (Storm Events does not record earthquakes). | ||
| Hail | 1.28 | events per year | about 1.28 per year | Highly likely | FEMA annualized frequency (modeled) | 55.1 (modeled) | 1986 to 2023 (38 years) | countywide | |
| Heat Wave | 5.09 | event-days per year | about 5.09 days per year | Likely | Storm Events event-days in 3 of 30 years, 1996 to 2025 (10%) | 53.5 | 2005-11-12 to 2024-11-12 (19 years) | countywide | |
| Hurricane | 0.174 | events per year | about 1 in 6 years | Likely | FEMA annualized frequency (modeled) | 54 | 1851 to 2024 (Atlantic) | see B1-f | NRI counts hurricane and tropical storm tracks passing within storm-force wind range; federal declarations are in B1-d. |
| Ice Storm | 0.618 | event-days per year | about 0.618 days per year | Storm Events event-days in 0 of 30 years, 1996 to 2025 (0%) | 31 | 1946-12-31 to 2014-02-12 (67 years) | countywide | No Storm Events ice storm record, 1996 to 2025 | |
| Inland Flooding | 2.32 | event-days per year | about 2.32 days per year | Likely | Storm Events event-days in 25 of 30 years, 1996 to 2025 (83.3%) | 65 | 1996 to 2023 (28 years) | see B1-f | |
| Landslide | 0.191 | events per year (modeled) | about 1 in 5 years | Likely | FEMA annualized frequency (modeled) | not shown | modeled | see B1-f | |
| Lightning | 18.7 | days per year with a strike | about 18.7 days per year | Highly likely | FEMA annualized frequency (modeled) | not shown | 1995 to 2023 (29 years; CONUS) | countywide | |
| Strong Wind | 0.659 | events per year | about 0.66 per year | Likely | FEMA annualized frequency (modeled) | 18 | 1986 to 2023 (38 years) | countywide | |
| Tornado | 0.144 | events per year | about 1 in 7 years | Likely | FEMA annualized frequency (modeled) | not shown | 1950 to 2023 (EF2+); 1986 to 2023 (EF0-1) | see B1-f | |
| Tsunami | annual probability at the most exposed location (used in place of a county value) | Storm Events records in 0 of 30 years, 1996 to 2025 (0%) | not shown | modeled | see B1-f | No descriptor: no Storm Events record 1996 to 2025 | |||
| Wildfire | 0.0000509 | annual probability at a location | chance a given location in the county burns in a year: 0.00509% | Storm Events records in 0 of 30 years, 1996 to 2025 (0%) | not shown | modeled | see B1-f | No descriptor: no Storm Events record 1996 to 2025 | |
| Winter Weather | 11.1 | event-days per year | about 11.1 days per year | Highly likely | Storm Events event-days in 27 of 30 years, 1996 to 2025 (90%) | 134 | 2005-11-12 to 2024-11-12 (19 years) | countywide |
FEMA annualized frequency (modeled) is the National Risk Index v1.20 (December 2025) estimate of how often a hazard affects this county in a year; it is not recorded events divided by years, and its unit differs by hazard (events, event-days, or days with a lightning strike per year). For earthquake, wildfire, coastal flooding and tsunami the value is the chance (or number of events) at a location in the county, not across the county, so no "1 in N years" is given and the descriptor comes from Storm Events where it has a record (none for earthquake). The Methods page gives each hazard's method, from FEMA's National Risk Index Technical Documentation v1.20.
Where NRI gives event-days, the descriptor comes from the share of years with a Storm Events record; NRI's source records more events, so the two differ.
Descriptor scale used in this packet (defined per unit)
Sources: 5, 6
| Unit | Descriptor | Definition |
|---|---|---|
| events per year | Highly likely | 1 or more per year |
| events per year | Likely | about once in 1 to 10 years |
| events per year | Possible | about once in 10 to 100 years |
| events per year | Unlikely | less than once in 100 years |
| annual probability | Likely | 10% to under 100% chance in a given year |
| annual probability | Possible | 1% to under 10% chance in a given year |
| annual probability | Unlikely | under 1% chance in a given year |
| event-days (share of years) | Highly likely | event-days recorded in 90% or more of years |
| event-days (share of years) | Likely | event-days recorded in 10% to under 90% of years |
| event-days (share of years) | Possible | event-days recorded in some years but under 10% of years |
| lightning strike-days | Highly likely | cloud-to-ground strikes on 1 or more days per year |
Intensity bands: historical frequency (Storm Events)
Source: 6
| Hazard | Band | Years | Eventscounty-coded records | Years in period | Events per yearevents / years |
|---|---|---|---|---|---|
| Hail | 1.00-1.99 in | 1996 to 2025 | 36 | 30 | 1.2 |
| Hail | 2.00 in+ | 1996 to 2025 | 4 | 30 | 0.133 |
| Thunderstorm Wind (counted as NRI Strong Wind) | 50-64 kt | 1996 to 2025 | 159 | 30 | 5.3 |
| Thunderstorm Wind (counted as NRI Strong Wind) | 65 kt+ | 1996 to 2025 | 4 | 30 | 0.133 |
| Thunderstorm Wind (counted as NRI Strong Wind) | unmeasured or below 50 kt | 1996 to 2025 | 14 | 30 | 0.467 |
| Tornado | EF0-1 | 1996 to 2025 | 3 | 30 | 0.1 |
| Tornado | EF2-3 | 1996 to 2025 | 0 | 30 | 0 |
| Tornado | EF4-5 | 1996 to 2025 | 0 | 30 | 0 |
| Tornado | unrated (EFU) | 1996 to 2025 | 0 | 30 | 0 |
The bands show how often events of each severity were recorded in this county, to profile how severe events have been (FEMA's probability item asks for the range of intensities).
Hail smaller than 1 inch is not counted: on 2010-01-05 the National Weather Service raised its severe-hail threshold from 3/4 inch to 1 inch, so smaller reports became less common after 2009 (NWS Service Change Notice 09-52). NRI hail frequency uses a 0.75 inch threshold.
Optional: future conditions. Not a required item in the 2025 FEMA Local Mitigation Planning Policy Guide; some states ask for it. The federal Climate Mapping for Resilience and Adaptation (CMRA) site gives county exposure to future climate conditions (https://resilience.climate.gov/).
Supports FEMA checklist item B1-f: hazards that vary across jurisdictions
Range of census tract risk within the county
Source: 5
| Hazard | Tractsrated of all | NRI risk score, 0 to 100 | Tracts by rating | ||
|---|---|---|---|---|---|
| Min | Median | Max | |||
| Coastal Flooding | 41 of 110 | 70.3 | 96.3 | 99.9 | Very High 2, Relatively High 24, Relatively Moderate 6, Relatively Low 3, Very Low 6, No Rating 69 |
| Cold Wave | 110 of 110 | 19.9 | 27.1 | 38.1 | Relatively Low 110 |
| Drought | 67 of 110 | 68.9 | 81.0 | 95.2 | Relatively Moderate 6, Relatively Low 33, Very Low 28, No Rating 43 |
| Earthquake | 110 of 110 | 21.9 | 48.7 | 80.3 | Relatively Moderate 2, Relatively Low 73, Very Low 35 |
| Hail | 110 of 110 | 1.2 | 4.4 | 14.7 | Very Low 110 |
| Heat Wave | 110 of 110 | 5.9 | 25.8 | 52.3 | Relatively Low 82, Very Low 28 |
| Hurricane | 110 of 110 | 57.2 | 74.0 | 83.4 | Relatively Moderate 26, Relatively Low 84 |
| Ice Storm | 110 of 110 | 8.7 | 46.7 | 82.1 | Relatively Moderate 5, Relatively Low 83, Very Low 22 |
| Inland Flooding | 110 of 110 | 0.8 | 38.8 | 89.8 | Relatively High 6, Relatively Moderate 35, Relatively Low 53, Very Low 16 |
| Landslide | 110 of 110 | 14.3 | 54.0 | 91.8 | Relatively Low 3, Very Low 107 |
| Lightning | 110 of 110 | 22.3 | 51.6 | 74.5 | Relatively Moderate 61, Relatively Low 49 |
| Strong Wind | 110 of 110 | 26.0 | 58.2 | 79.7 | Relatively Moderate 67, Relatively Low 43 |
| Tornado | 110 of 110 | 4.4 | 22.7 | 38.6 | Relatively Low 14, Very Low 96 |
| Tsunami | 0 of 110 | Insufficient Data 110 | |||
| Wildfire | 105 of 110 | 18.5 | 49.7 | 77.2 | Relatively Low 10, Very Low 95, No Rating 5 |
| Winter Weather | 110 of 110 | 16.1 | 22.7 | 30.9 | Relatively Low 97, Very Low 13 |
Drought: Agriculture is all of NRI's expected annual loss for this hazard in the county, so the tract range mostly reflects where crop and livestock value is.
Rated tracts only: No Rating (score 0.0), Not Applicable and Insufficient Data tracts are counted but not used for the minimum, median and maximum.
The score ranks a tract against all U.S. tracts (100 = highest). The rating is FEMA's category for the tract's risk value, computed differently, so the two can disagree.
Frequency data for cold wave, drought, hail, heat wave, ice storm, lightning, strong wind and winter weather are county-wide or coarse (49 km grid or NWS zone), the same for every jurisdiction; the tract range mostly reflects where buildings and people are (crop and livestock value where a line above names agriculture).
Each jurisdiction (starting figures from federal data)
Sources: 1, 3, 4, 6
| Jurisdiction | Type | Plan status | Repetitive lossFMA RL and SRL (44 CFR 77.2); repeat-flood, any definition | Public Assistance to this jurisdictionFEMA records matched by applicant name; federal share obligated, nominal dollars | Event records naming this placeall years; since its plan | Notes |
|---|---|---|---|---|---|---|
| Bridgewater Town city | Town | Approved, expires 2027-08-10 | FMA RL 0, SRL 0; any 2 | no Public Assistance recorded | 0 total; 0 since its plan | |
| Brockton city | City | Approved, expires 2027-12-13 | FMA RL 0, SRL 2; any 40 | $2,813,814.10 | 23 total; 1 since its plan | |
| Abington town | Town | Approved, expires 2030-02-11 | FMA RL 0, SRL 0; any 0 | $553,189.16 | 6 total; 0 since its plan | |
| Carver town | Town | Approved, expires 2027-06-29 | FMA RL 0, SRL 0; any 1 | $808,800.89 | 3 total; 0 since its plan | |
| Duxbury town | Town | Expired on 2024-01-08 | FMA RL 1, SRL 13; any 66 | $4,627,285.84 | 12 total; 1 since its plan | Includes $32,740.37 for declarations not counted as hazard incidents (DR-4496-MA). |
| East Bridgewater town | Town | Expired on 2020-11-12 | FMA RL 0, SRL 0; any 1 | $570,170.99 | 5 total; 2 since its plan | |
| Halifax town | Town | Approved, expires 2027-02-13 | FMA RL 0, SRL 0; any 0 | $356,914.71 | 10 total; 1 since its plan | |
| Hanover town | Town | Approved, expires 2030-04-15 | FMA RL 0, SRL 0; any 0 | $2,529,295.36 | 8 total; 0 since its plan | Includes $1,750,066.07 for declarations not counted as hazard incidents (DR-4496-MA). |
| Hanson town | Town | Approved, expires 2027-01-03 | FMA RL 0, SRL 0; any 0 | $473,322.28 | 5 total; 0 since its plan | |
| Hingham town | Town | Approved, expires 2027-07-10 | FMA RL 0, SRL 3; any 10 | $4,245,986.53 | 35 total; 1 since its plan | Includes $2,383,064.87 for declarations not counted as hazard incidents (DR-4496-MA). |
| Hull town | Town | Approved, expires 2029-09-12 | FMA RL 2, SRL 34; any 259 | $2,484,044.88 | 6 total; 0 since its plan | Includes $84,842.28 for declarations not counted as hazard incidents (DR-4496-MA). |
| Kingston town | Town | Approved, expires 2027-09-01 | FMA RL 0, SRL 0; any 0 | $698,603.88 | 4 total; 0 since its plan | Includes $8,105.14 for declarations not counted as hazard incidents (EM-3252-MA). |
| Lakeville town | Town | Approved, expires 2027-09-11 | FMA RL 0, SRL 0; any 2 | $416,084.29 | 4 total; 0 since its plan | |
| Marion town | Town | Approved, expires 2027-01-10 | FMA RL 0, SRL 0; any 6 | $437,398.81 | 11 total; 1 since its plan | |
| Marshfield town | Town | Approved, expires 2028-12-12 | FMA RL 6, SRL 44; any 186 | $4,939,988.69 | 3 total; 0 since its plan | |
| Mattapoisett town | Town | Approved, expires 2031-01-29 | FMA RL 0, SRL 0; any 10 | $312,000.66 | 3 total; 0 since its plan | |
| Middleborough town | Town | Approved, expires 2029-04-11 | FMA RL 0, SRL 0; any 1 | $872,231.97 | 0 total; 0 since its plan | |
| Norwell town | Town | Expired on 2025-12-03 | FMA RL 0, SRL 0; any 1 | $496,908.04 | 5 total; 0 since its plan | |
| Pembroke town | Town | Approved, expires 2028-02-15 | FMA RL 0, SRL 0; any 0 | $632,285.84 | 9 total; 0 since its plan | |
| Plymouth town | Town | Approved, expires 2026-12-15 | FMA RL 2, SRL 7; any 45 | $1,720,441.93 | 35 total; 2 since its plan | |
| Plympton town | Town | Approved, expires 2026-12-07 | FMA RL 0, SRL 0; any 0 | $164,018.85 | 2 total; 0 since its plan | |
| Rochester town | Town | Approved, expires 2030-07-20 | FMA RL 0, SRL 0; any 0 | $410,391.96 | 7 total; 0 since its plan | |
| Rockland town | Town | Expired on 2024-08-26 | FMA RL 0, SRL 0; any 0 | $971,083.85 | 5 total; 1 since its plan | Includes $65,692 for declarations not counted as hazard incidents (DR-4496-MA). |
| Scituate town | Town | Approved, expires 2027-06-29 | FMA RL 18, SRL 171; any 537 | $8,270,744.51 | 12 total; 1 since its plan | |
| Wareham town | Town | Expired on 2025-12-20 | FMA RL 0, SRL 3; any 21 | $1,078,613.48 | 4 total; 0 since its plan | |
| West Bridgewater town | Town | Approved, expires 2027-11-01 | FMA RL 0, SRL 0; any 0 | $421,918.50 | 6 total; 0 since its plan | |
| Whitman town | Town | Approved, expires 2027-01-06 | FMA RL 0, SRL 0; any 1 | $347,098.83 | 15 total; 0 since its plan |
Repetitive-loss counts are for whole NFIP communities, which can extend beyond this county (see the note in B2-c).
County Public Assistance in B1-d also includes applicants filed under the county that are not jurisdictions in this plan (for example state agencies, special districts and nonprofits), so the jurisdiction rows add up to less.
Supports FEMA checklist items B2-a and B2-b: vulnerability and potential impacts
Local data needed
The table below gives county-level starting figures; the plan describes impacts for each jurisdiction and its own assets.
No county-level plan row in FEMA data, so there is no approval date to count from.
- Critical facilities and lifelines per hazard
- A problem statement per jurisdiction per hazard
- Changes in development in hazard-prone areas since the last approval, or a statement of none (E1-a)
- Future assets
County-level starter: exposure, expected annual loss and damage since the plan
Sources: 1, 2, 3, 5, 6, 7
| Hazard | Building exposuremodeled dollars | Agriculture exposuremodeled dollars | Population exposedpeople | EAL buildingsmodeled dollars per year | EAL agriculturemodeled dollars per year | Cost of expected deaths and injuriesFEMA's dollar value per year, not property damage | EAL as % of exposurebuildings; agriculture where noted | Storm Events damage since plancounty-coded records, property plus crops, nominal dollars | Zone-level damage since planproperty plus crops, reported for the zone | Public Assistance since plannominal dollars; see note | Note |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Coastal Flooding | $8,567,076,367 | n/a | 35,642 | $14,314,229 | n/a | $21,828 | 0.167% | ||||
| Cold Wave | $115,081,264,762 | $92,622,203 | 530,320 | $1,293 | $7,725 | $1,975,106 | under 0.0001% | ||||
| Drought | n/a | $71,289,181 | n/a | n/a | $690,039 | n/a | 0.968% (agriculture) | NRI has no building exposure for this hazard; agriculture shown | |||
| Earthquake | $195,481,701,179 | n/a | 530,819 | $4,080,048 | n/a | $779,549 | 0.00209% | ||||
| Hail | $115,081,264,762 | $92,622,203 | 530,320 | $19,303 | $224 | $7,457 | under 0.0001% | ||||
| Heat Wave | $115,081,264,762 | $92,622,203 | 530,320 | $3 | $11,003 | $2,535,218 | under 0.0001% | ||||
| Hurricane | $115,079,871,287 | $92,622,203 | 530,307 | $10,245,702 | $721,624 | $320,704 | 0.0089% | ||||
| Ice Storm | $113,214,701,823 | n/a | 522,092 | $620,728 | n/a | $69,107 | 0.000548% | ||||
| Inland Flooding | $114,879,203,462 | $23,971,768 | 30,563 | $70,400,283 | $497,798 | $461,245 | n/a (see note) | NRI counts the full building value of any census block with some flood loss; this is not the value of buildings in the floodplain. Use local FIRM overlays for B2-a/B2-b. | |||
| Landslide | $1,922,568,645 | n/a | 8,074 | $3,400 | n/a | $566 | 0.000177% | ||||
| Lightning | $115,081,264,762 | n/a | 530,320 | $82,283 | n/a | $1,565,714 | under 0.0001% | ||||
| Strong Wind | $115,081,264,762 | $92,622,203 | 530,320 | $1,214,583 | $200 | $1,987,355 | 0.00106% | ||||
| Tornado | $115,081,264,762 | $92,622,203 | 530,320 | $1,319,957 | $661 | $220,789 | 0.00115% | ||||
| Tsunami | n/a | n/a | n/a | n/a | n/a | n/a | NRI publishes no building exposure for this county | ||||
| Wildfire | $15,817,615,588 | $31,261,760 | 89,492 | $69,236 | $12 | $8,268 | 0.000438% | ||||
| Winter Weather | $115,081,264,762 | $92,622,203 | 530,320 | $39,578 | $31 | $20,133 | under 0.0001% |
Totals since the plan: not available. No county-level plan row in FEMA data, so there is no approval date to count from.
FEMA does not split Public Assistance by hazard. A declaration mapped to several hazards is listed under each of them with its full amount, so the per-hazard column does not add up to the total; the unit total counts each declaration once.
NRI computes earthquake exposure on its own basis, so it exceeds the county building value in B2-a.
Supports FEMA checklist item B2-a: vulnerability (county context)
County context
Source: 5
| Measure | Value |
|---|---|
| Population | 530,320 |
| Building value (total, not at risk) | $115,081,264,762 |
| Agriculture value (total, not at risk) | $92,622,203 |
| NRI risk rating (all hazards) | Relatively Moderate |
| Expected annual loss, buildings and agriculture, all hazards | $104,339,943 |
| Expected annual loss, population equivalence, all hazards (NRI values each statistical life at $13.7M; a modeled value of expected deaths and injuries, not property damage) | $9,973,041 |
| Social vulnerability rating | Very Low |
| Community resilience rating | Very High |
| NRI version | December 2025 |
FEMA's all-hazard expected annual loss adds buildings, agriculture and population equivalence; this table gives the property part and the population-equivalence part as separate rows.
Social vulnerability: higher means people are more likely to be harmed and slower to recover. Community resilience: lower means the community is less able to recover. High social vulnerability and low resilience both raise the NRI risk rating.
Supports FEMA checklist item B2-c: repetitive loss properties
Repetitive loss in this county, both definitions
Sources: 1, 4
| Definition | Properties | Severe repetitive loss | Properties |
|---|---|---|---|
| Repetitive loss, FMA definition (44 CFR 77.2) | 29 | Severe repetitive loss, FMA definition (44 CFR 77.2) | 277 |
| Repetitive loss, NFIP insurance definition | 1,162 | Severe repetitive loss, NFIP insurance definition | 242 |
The state NFIP coordinator's list, the source FEMA's Handbook names, often uses the NFIP insurance definition (second row).
Repeat-flood properties: county total and NFIP communities
Sources: 1, 4
| Scope | RL, FMAproperties | SRL, FMAproperties | RL, NFIPproperties | SRL, NFIPproperties | Any categoryproperties | Mitigatedproperties | Currently insuredproperties |
|---|---|---|---|---|---|---|---|
| County total | 29 | 277 | 1,162 | 242 | 1,191 | 27 | 649 |
| of which: Bridgewater town | 0 | 0 | 2 | 0 | 2 | 0 | 0 |
| of which: Brockton city | 0 | 2 | 40 | 2 | 40 | 0 | 17 |
| of which: Carver town | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| of which: Duxbury town | 1 | 13 | 65 | 11 | 66 | 0 | 42 |
| of which: East Bridgewater town | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| of which: Hingham town | 0 | 3 | 10 | 3 | 10 | 0 | 2 |
| of which: Hull town | 2 | 34 | 258 | 32 | 259 | 1 | 144 |
| of which: Lakeville town | 0 | 0 | 2 | 0 | 2 | 0 | 1 |
| of which: Marshfield town | 6 | 44 | 180 | 38 | 186 | 6 | 100 |
| of which: Middleborough town | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| of which: Norwell town | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| of which: Plymouth town | 2 | 7 | 44 | 6 | 45 | 1 | 12 |
| of which: Scituate town | 18 | 171 | 517 | 147 | 537 | 19 | 324 |
| of which: Whitman town | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| of which: Marion town | 0 | 0 | 6 | 0 | 6 | 0 | 1 |
| of which: Mattapoisett town | 0 | 0 | 10 | 0 | 10 | 0 | 2 |
| of which: Wareham town | 0 | 3 | 21 | 3 | 21 | 0 | 4 |
| of which: Unknown (community ID Unknown in FEMA data) | 0 | 0 | 2 | 0 | 2 | 0 | 0 |
Repeat-flood properties by jurisdiction in the plan (NFIP community)
Sources: 1, 4
| Jurisdiction | NFIP community ID | RL, FMAproperties | SRL, FMAproperties | RL, NFIPproperties | SRL, NFIPproperties | Any categoryproperties | Mitigatedproperties | Currently insuredproperties |
|---|---|---|---|---|---|---|---|---|
| Bridgewater Town city | 250260 | 0 | 0 | 2 | 0 | 2 | 0 | 0 |
| Brockton city | 250261 | 0 | 2 | 40 | 2 | 40 | 0 | 17 |
| Abington town | 250259 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Carver town | 250262 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| Duxbury town | 250263 | 1 | 13 | 65 | 11 | 66 | 0 | 42 |
| East Bridgewater town | 250264 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| Halifax town | 250265 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Hanover town | 250266 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Hanson town | 250267 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Hingham town | 250268 | 0 | 3 | 10 | 3 | 10 | 0 | 2 |
| Hull town | 250269 | 2 | 34 | 258 | 32 | 259 | 1 | 144 |
| Kingston town | 250270 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Lakeville town | 250271 | 0 | 0 | 2 | 0 | 2 | 0 | 1 |
| Marion town | 255213 | 0 | 0 | 6 | 0 | 6 | 0 | 1 |
| Marshfield town | 250273 | 6 | 44 | 180 | 38 | 186 | 6 | 100 |
| Mattapoisett town | 255214 | 0 | 0 | 10 | 0 | 10 | 0 | 2 |
| Middleborough town | 250275 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| Norwell town | 250276 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| Pembroke town | 250277 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Plymouth town | 250278 | 2 | 7 | 44 | 6 | 45 | 1 | 12 |
| Plympton town | 250279 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rochester town | 250280 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rockland town | 250281 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Scituate town | 250282 | 18 | 171 | 517 | 147 | 537 | 19 | 324 |
| Wareham town | 255223 | 0 | 3 | 21 | 3 | 21 | 0 | 4 |
| West Bridgewater town | 250284 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Whitman town | 250285 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
Counts by occupancy group for each jurisdiction are in the Excel file, sheet "B2-c Jurisdictions".
Jurisdiction rows are whole NFIP communities and need not add up to the county total: a community that extends into another county is counted in full on each jurisdiction row, while the county table counts only its part in this county.
County repeat-flood properties by occupancy group
Sources: 1, 4
| Occupancy group | RL, FMAproperties | SRL, FMAproperties | RL, NFIPproperties | SRL, NFIPproperties | Any categoryproperties | Mitigatedproperties | Currently insuredproperties |
|---|---|---|---|---|---|---|---|
| single-family residential | 27 | 245 | 1,049 | 214 | 1,074 | 23 | 608 |
| 2 to 4 unit residential | 2 | 10 | 51 | 8 | 53 | 2 | 22 |
| other residential | 0 | 8 | 17 | 7 | 18 | 1 | 11 |
| non-residential | 0 | 14 | 45 | 13 | 46 | 1 | 8 |
| not reported | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
FEMA's occupancy groups have no institutional class; institutional properties are counted in non-residential or other residential in the table by occupancy group.
FMA RL and FMA SRL are the Flood Mitigation Assistance definitions (44 CFR 77.2), the ones the FEMA Local Mitigation Planning Policy Guide cites. NFIP repetitive loss (the FEMA insurance definition) is 2 or more claims over $1,000 in 10 years, and a property can leave that group once it is mitigated. Also shown: NFIP severe repetitive loss, any category, mitigated and currently insured. The Methods page gives the OpenFEMA field details.
Counts are aggregates of FEMA's public NFIP Multiple Loss Properties file (FEMA's data date 2026-08-02; file version 2026-08-04). No property is identified. County assignment is FEMA's geocode.
In this county 9 properties are FMA repetitive loss but not NFIP repetitive loss, and 1,142 properties are NFIP repetitive loss but not FMA repetitive loss.
Exact counts; no count suppression.
Sources
Tables cite these sources by number. The full list, for the plan's bibliography (FEMA review item A4-a):
- FEMA, OpenFEMA HazardMitigationPlanStatuses v1, version 2026-09-29T134039Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/HazardMitigationPlanStatuses (API)
- FEMA, OpenFEMA DisasterDeclarationsSummaries v2, version 2026-09-29T162832Z, pulled 2026-09-30, https://www.fema.gov/api/open/v2/DisasterDeclarationsSummaries (API)
- FEMA, OpenFEMA PublicAssistanceFundedProjectsSummaries v1, version 2026-09-29T150754Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/PublicAssistanceFundedProjectsSummaries (API)
- FEMA, OpenFEMA NfipMultipleLossProperties v1, version 2026-08-04T164045Z, pulled 2026-09-30, https://www.fema.gov/api/open/v1/NfipMultipleLossProperties (API)
- FEMA, FEMA National Risk Index 1.20.0 (December 2025), county and census tract tables, version 1.20.0, pulled 2026-09-30, https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_Counties.zip (download, 25 MB), https://www.fema.gov/about/reports-and-data/openfema/nri/v120/NRI_Table_CensusTracts.zip (download, 635 MB)
- NOAA NCEI, NOAA NCEI Storm Events Database, details files (csvfiles v1.0), version c20260918, pulled 2026-09-30, https://www.ncei.noaa.gov/pub/data/swdi/stormevents/csvfiles/
- NOAA National Weather Service, NWS county-public forecast zones correlation file, version bp03mr20 to bp16ap26 (11 files; newest bp16ap26), pulled 2026-09-30, https://www.weather.gov/gis/ZoneCounty
- U.S. Census Bureau, Census 2024 Gazetteer, 2020 place by county, CT county-to-cousub crosswalk, version 2024-gazetteer, pulled 2026-09-30, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_counties_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_cousubs_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_place_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_unsd_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_elsd_national.zip, https://www2.census.gov/geo/docs/maps-data/data/gazetteer/2024_Gazetteer/2024_Gaz_scsd_national.zip, https://www2.census.gov/geo/docs/reference/codes2020/national_place_by_county2020.txt, https://www2.census.gov/geo/docs/reference/ct_change/ct_cou_to_cousub_crosswalk.xlsx (used to match place names and codes; no table prints its values)
What this packet is and what the plan adds
This packet is the federal data for the plan's risk assessment (the summary on page 1 says how it is organized); the plan and FEMA's review decide whether each item is met.
The plan adds what only the community has: local data on assets, critical facilities, development and each jurisdiction's impacts; local hazard history, including state-declared emergencies; the mitigation strategy; and adoption.
How the federal data are built: National Risk Index values are FEMA's model, not counts of events. Storm Events is more complete from 1996; zone-level records are placed by forecast zone, not by location in the county. Public Assistance for a jurisdiction is matched by applicant name. The Methods page gives every rule and the known edge cases.
OpenFEMA disclaimer
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).
Reuse, citation and corrections
Reuse and citation: Hazard Plain text and tables are licensed under Creative Commons Attribution 4.0 International (CC BY 4.0, https://creativecommons.org/licenses/by/4.0/); credit Hazard Plain and the release. The underlying federal data are public domain; OpenFEMA data are also subject to the OpenFEMA terms and conditions.
Cite this: Hazard Plain (2026). Plymouth County, MA: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-30; County FIPS 25023). Automated baseline. https://hazardplain.org/ma/25023/ Built from FEMA OpenFEMA, the FEMA National Risk Index and NOAA NCEI Storm Events; source versions in the packet's Sources list.
Corrections: to report an error, name the packet, the table and what your records show. Contact: contact@hazardplain.org