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 ($103,067,766 a year), Hurricane ($15,628,146) and Earthquake ($8,881,734).
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: 29 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 | Update underway |
|---|---|---|---|---|---|---|---|
| Braintree Town city | City | Approved, expires 2029-11-19 | Town of Braintree, MA Hazard Mitigation Plan Update April 2024 (FEMA plan 109891) | 2024-11-20 | 2029-11-19 | 1,146 | |
| Franklin Town city | Town | Expired on 2026-01-21 | Town of Franklin Hazard Mitigation Plan 2020 Update (FEMA plan 106880) | 2021-01-22 | 2026-01-21 | -252 | |
| Quincy city | City | Approved, expires 2030-12-04 | City of Quincy Multi-Hazard Mitigation Plan (FEMA plan 110472) | 2025-12-05 | 2030-12-04 | 1,526 | |
| Randolph Town city | Town | Expired on 2021-09-20 | Town of Randolph Hazard Mitigation Plan 2014 Update (FEMA plan 12264) | 2016-09-20 | 2021-09-20 | -1,836 | |
| Weymouth Town city | Town | Approved, expires 2026-11-28 | Town of Weymouth Hazard Mitigation Plan 2021 Update (FEMA plan 107812) | 2021-11-29 | 2026-11-28 | 59 | |
| Avon town | Town | Approved, expires 2027-01-10 | Town of Avon Massachusetts Hazard Mitigation Plan and Municipal Vulnerability Report (FEMA plan 107770) | 2022-01-11 | 2027-01-10 | 102 | |
| Bellingham town | Town | Expired on 2025-11-03 | Town of Bellingham Hazard Mitigation Plan 2020 Update (FEMA plan 106813) | 2020-11-04 | 2025-11-03 | -331 | |
| Brookline town | Town | Approved, expires 2028-11-27 | Town of Brookline, MA Hazard Mitigation Plan Update June 2023 (FEMA plan 109173) | 2023-11-28 | 2028-11-27 | 789 | |
| Canton town | Town | Expired on 2023-06-21 | Town of Canton Hazard Mitigation Plan 2017 Update (Draft) (FEMA plan 104767) | 2018-06-22 | 2023-06-21 | -1,197 | |
| Cohasset town | Town | Expired on 2025-11-11 | Town of Cohasset Hazard Mitigation Plan 2020 Update (FEMA plan 106725) | 2020-11-12 | 2025-11-11 | -323 | |
| Dedham town | Town | Expired on 2026-02-23 | 2020 Hazard Mitigation Plan Update Town of Dedham, Massachusetts (FEMA plan 106745) | 2021-02-24 | 2026-02-23 | -219 | |
| Dover town | Town | Approved, expires 2027-09-25 | Town of Dover Draft Hazard Mitigation Plan 2022 Update (FEMA plan 108146) | 2022-09-26 | 2027-09-25 | 360 | |
| Foxborough town | Town | Expired on 2025-10-14 | Town of Foxborough Hazard Mitigation Plan (FEMA plan 106686) | 2020-10-15 | 2025-10-14 | -351 | |
| Holbrook town | Town | No approved plan on record | none | none | none | FEMA tracker shows a plan in review | |
| Medfield town | Town | Expired on 2024-09-19 | Town of Medfield Hazard Mitigation Plan 2019 Update (FEMA plan 105925) | 2019-09-20 | 2024-09-19 | -741 | |
| Medway town | Town | Approved, expires 2030-01-12 | Town of Medway Hazard Mitigation Plan 2024 Update (FEMA plan 109747) | 2025-01-13 | 2030-01-12 | 1,200 | |
| Millis town | Town | Approved, expires 2030-11-12 | Town of Millis Hazard Mitigation Plan 2025 Update (FEMA plan 110882) | 2025-11-13 | 2030-11-12 | 1,504 | |
| Milton town | Town | Approved, expires 2027-01-06 | Town of Milton Hazard Mitigation Plan 2021 Update (FEMA plan 107811) | 2022-01-07 | 2027-01-06 | 98 | |
| Needham town | Town | Expired on 2026-01-21 | Town of Needham Hazard Mitigation Plan 2020 Update (FEMA plan 106729) | 2021-01-22 | 2026-01-21 | -252 | |
| Norfolk town | Town | Approved, expires 2029-02-27 | Town of Norfolk Hazard Mitigation Plan 2023 Update (FEMA plan 109227) | 2024-02-28 | 2029-02-27 | 881 | |
| Norwood town | Town | Approved, expires 2030-09-15 | Town of Norwood Hazard Mitigation Plan 2024 Update (FEMA plan 110315) | 2025-09-16 | 2030-09-15 | 1,446 | |
| Plainville town | Town | Expired on 2013-04-02 | Southeastern Regional Planning and Economic Development District (SRPEDD) (FEMA plan 12041) | 2008-04-03 | 2013-04-02 | -4,929 | |
| Sharon town | Town | Approved, expires 2030-10-19 | Town of Sharon Hazard Mitigation Plan 2024 Update (FEMA plan 110410) | 2025-10-20 | 2030-10-19 | 1,480 | |
| Stoughton 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 | |
| Walpole town | Town | Expired on 2022-05-31 | Town of Walpole Hazard Mitigation Plan Draft 2017 Plan Update (FEMA plan 104203) | 2017-06-01 | 2022-05-31 | -1,583 | |
| Wellesley town | Town | Approved, expires 2029-02-22 | Town of Wellesley, MA Hazard Mitigation Plan (FEMA plan 109310) | 2024-02-23 | 2029-02-22 | 876 | |
| Westwood town | Town | Approved, expires 2029-04-11 | Westwood, MA Hazard Mitigation Plan 2022 Update February 2023 (FEMA plan 108925) | 2024-04-12 | 2029-04-11 | 924 | |
| Wrentham town | Town | Expired on 2023-11-26 | Town of Wrentham Hazard Mitigation Plan 2018 Update (FEMA plan 105354) | 2018-11-27 | 2023-11-26 | -1,039 | |
| Name not given in FEMA data (ID NM01_12386) | College/University | Expired on 2021-05-12 | University of Massachusetts Multi-Campus Hazard Mitigation Plan (FEMA plan 12383) | 2016-05-12 | 2021-05-12 | -1,967 |
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 High | Relatively High | $102,429,843 | $24 | $637,899 | $103,067,766 | 148 | |
| 2 | Hurricane | Relatively Moderate | Relatively High | $15,130,182 | $51,197 | $446,768 | $15,628,146 | 6 | |
| 3 | Earthquake | Relatively Moderate | Relatively Moderate | $7,106,937 | n/a | $1,774,797 | $8,881,734 | Storm Events does not record earthquakes. | |
| 4 | Coastal Flooding | Relatively High | Relatively High | $5,070,024 | n/a | $20,621 | $5,090,645 | 71 | |
| 5 | Heat Wave | Relatively Moderate | Relatively Moderate | $5 | $914 | $3,861,543 | $3,862,462 | 30 | |
| 6 | Cold Wave | Relatively Moderate | Relatively Moderate | $2,308 | $689 | $3,321,296 | $3,324,293 | 9 | |
| 7 | Tornado | Relatively Moderate | Relatively Moderate | $2,798,739 | $65 | $389,797 | $3,188,601 | 8 | |
| 8 | Lightning | Relatively High | Relatively High | $202,168 | n/a | $1,049,609 | $1,251,777 | 56 | |
| 9 | Ice Storm | Relatively High | Relatively High | $1,155,664 | n/a | $35,116 | $1,190,780 | 0 | No recorded events in Storm Events since 1996 (data through 2026-06-30). |
| 10 | Strong Wind | Relatively Moderate | Relatively Moderate | $650,411 | under $1 | $488,760 | $1,139,170 | 606 | Includes 189 High Wind and 190 Strong Wind records (NOAA non-thunderstorm wind types, outside NRI's Strong Wind definition). |
| 11 | Drought | Relatively Low | Relatively Low | n/a | $97,921 | n/a | $97,921 | 13 | |
| 12 | Winter Weather | Relatively Low | Relatively Moderate | $56,415 | $3 | $24,851 | $81,269 | 166 | |
| 13 | Wildfire | Very Low | Very Low | $55,475 | $1 | $5,391 | $60,867 | 1 | |
| 14 | Hail | Very Low | Very Low | $32,194 | $44 | $10,374 | $42,613 | 75 | |
| 15 | Landslide | Relatively Low | Relatively Low | $8,740 | n/a | $636 | $9,376 | 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 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 4191 (Relatively Moderate, 80.6); tract 4035.01 (Relatively Moderate, 79.8); tract 4041 (Relatively Moderate, 79.0) |
| Hurricane | tract 4191 (Relatively Moderate, 83.6); tract 4035.01 (Relatively Moderate, 82.9); tract 4571 (Relatively Moderate, 82.8) |
| Landslide | tract 4051 (Relatively Low, 92.3); tract 4231.02 (Relatively Low, 88.4); tract 4412.03 (Relatively Low, 87.7) |
| Tornado | tract 4035.01 (Relatively Low, 46.7); tract 4034 (Relatively Low, 43.8); tract 4051 (Relatively Low, 42.4) |
| Tsunami | no tract has a National Risk Index rating for this hazard |
| Wildfire | tract 4051 (Relatively Low, 82.7); tract 4034 (Relatively Low, 74.3); tract 4061.02 (Relatively Low, 72.6) |
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 4191 is Census Tract 4191). 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) | 71 records, 1996 to 2024 (70 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: Quincy city (1 record). Zone-level records (70) apply countywide. | Flood depth: see the FEMA Flood Insurance Rate Map. | ||
| Cold/Wind Chill, Extreme Cold/Wind Chill | wind chill | 9 records, 1999 to 2018 (9 zone-level) | 1 day to 2 days (median 1 day); 6 with a recorded value | 2 consecutive days, 2007-02-03 to 2007-02-04, 1 direct death, zone-level | Countywide (zone-level records). | Cold/Wind Chill records from May to September (a frost night, not a cold wave) are counted but not used for the longest run. | |
| Frost/Freeze (outside NRI's Cold Wave definition) | crop damage | 0 | |||||
| Drought | U.S. Drought Monitor scale (D0 to D4) | 13 records, 1999 to 2017 (13 zone-level) | 1 day to 183 days (median 17.5 days); 4 with a recorded value | 183 days (about 6.0 months), 2016-07-26 to 2017-01-24, a run of 9 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, 1965 to 2024 | 0.75 in to 2 in (median 0.88 in); 82 with a recorded value | 2 in hail, 2020-06-28; same size also recorded on 1969-04-19 | Event records naming jurisdictions in the plan: Foxborough town (5 records), Needham town (5 records), Bellingham town (4 records), Stoughton town (4 records), Walpole town (4 records), Wrentham town (4 records), Avon town (3 records), Medway town (3 records), Norfolk town (3 records), Quincy city (3 records); and 9 more jurisdictions (see the Excel file). | ||
| Excessive Heat, Heat | heat index (in event narratives) | 30 records, 1996 to 2018 (30 zone-level) | 1 day to 3 days (median 1 day); 14 with a recorded value | 3 consecutive days, 1999-09-07 to 1999-09-09, zone-level | Countywide (zone-level records). | Heat records from November to March (unseasonable warmth, not a heat wave) are counted but not used for the longest run. | |
| Hurricane, Tropical Storm, Tropical Depression | Saffir-Simpson | 6 records, 2011 to 2021 (6 zone-level) | Strongest recorded: Tropical Storm record, 2011-08-28, $3,500,000 property; $0 crops (2011 dollars); NWS zone MAZ013 | 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) | 148 records, 1996 to 2025 (11 zone-level) | Flash Flood, 2020-06-28, $30,000,000 property; $0 crops (2020 dollars) | Event records naming jurisdictions in the plan: Walpole town (8 records), Quincy city (6 records), Brookline town (5 records), Holbrook town (4 records), Needham town (4 records), Norwood town (4 records), Dover town (3 records), Sharon town (3 records), Wellesley town (3 records), Wrentham town (3 records); and 10 more jurisdictions (see the Excel file). Zone-level records (11) 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) | 56 records, 1996 to 2023 | Lightning, 2009-05-24, $1,000,000 property; $0 crops (2009 dollars) | Event records naming jurisdictions in the plan: Milton town (5 records), Sharon town (4 records), Stoughton town (3 records), Wrentham town (3 records), Needham town (2 records), Norfolk town (2 records), Norwood town (2 records), Plainville town (2 records), Quincy city (2 records), Bellingham town (1 record); and 7 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) | 379 records, 1996 to 2025 (379 zone-level) | 27 kt (31 mph) to 85 kt (98 mph) (median 50 kt (58 mph)); 314 with a recorded value | 85 kt (98 mph) measured gust, High Wind, 2006-01-18; NWS zone MAZ016 | High Wind, 2012-10-29, $3,000,000 property; $0 crops (zone total, 2012 dollars) | Countywide (zone-level records). | |
| Thunderstorm Wind | wind speed (kt and mph) | 254 records, 1956 to 2026 | 40 kt (46 mph) to 70 kt (81 mph) (median 50 kt (58 mph)); 236 with a recorded value | 70 kt (81 mph), measurement type not recorded, Thunderstorm Wind, 1999-07-06 | Thunderstorm Wind, 2016-07-22, $50,000 property; $0 crops (2016 dollars) | Event records naming jurisdictions in the plan: Walpole town (14 records), Brookline town (13 records), Medway town (13 records), Milton town (11 records), Wellesley town (11 records), Needham town (9 records), Quincy city (9 records), Foxborough town (8 records), Wrentham town (8 records), Medfield town (6 records); and 13 more jurisdictions (see the Excel file). | |
| Tornado | Enhanced Fujita (Fujita before Feb 2007) | 15 records, 1953 to 2023 | F/EF0 to F/EF3 (median F/EF0); 15 with a recorded value | F3 tornado, 1953-06-09, 13.1 mi path length (whole path, pre-1996), 667 yd wide, $2,500,000 property; crops not recorded (1953 dollars), 15 direct injuries | Event records naming jurisdictions in the plan: Stoughton town (2 records), Bellingham town (1 record), Millis town (1 record), Wrentham 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) | 1 record, 2012 (1 zone-level) | No damage reported in 1 record. | Countywide (zone-level records). | |||
| Winter Storm, Heavy Snow, Blizzard, Lake-Effect Snow, Winter Weather, Sleet | none in data (snowfall: local data) | 166 records, 1996 to 2026 (166 zone-level) | Heavy Snow, 1996-01-07, $7,000,000 property; crops not reported (1996 dollars); NWS zone MAZ015 | 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: 38 declarations covering 29 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 | no Public Assistance recorded | within last 5 years | |
| 2022-04-18 | 2022-01-28 | DR-4651-MA | Major disaster | Severe Winter Storm and Snowstorm | Winter Weather | $5,279,440.40 | within last 5 years | |
| 2020-03-27 | 2020-01-20 | DR-4496-MA | Major disaster | COVID-19 Pandemic | Non-natural, not counted | $51,481,681.05 | ||
| 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 | |
| 2018-07-19 | 2018-03-13 | DR-4379-MA | Major disaster | Severe Winter Storm and Snowstorm | Winter Weather | $4,047,879.40 | ||
| 2018-06-25 | 2018-03-02 | DR-4372-MA | Major disaster | Severe Winter Storm and Flooding | Inland Flooding; Winter Weather | $6,875,355.88 | ||
| 2015-04-13 | 2015-01-26 | DR-4214-MA | Major disaster | Severe Winter Storm, Snowstorm, and Flooding | Inland Flooding; Winter Weather | $9,261,345.75 | ||
| 2013-04-19 | 2013-02-08 | DR-4110-MA | Major disaster | Severe Winter Storm, Snowstorm, and Flooding | Inland Flooding; Winter Weather | $4,855,562.13 | ||
| 2013-04-17 | 2013-04-15 | EM-3362-MA | Emergency | Explosions | Non-natural, not counted | $39,796.74 | ||
| 2012-10-28 | 2012-10-27 | EM-3350-MA | Emergency | Hurricane Sandy | Hurricane | no Public Assistance recorded | ||
| 2011-11-01 | 2011-10-29 | EM-3343-MA | Emergency | Severe Storm | Hazard not mapped (severe storm title names no single hazard); not counted | no Public Assistance recorded | ||
| 2011-09-03 | 2011-08-27 | DR-4028-MA | Major disaster | Tropical Storm Irene | Hurricane | $2,024,728.03 | ||
| 2011-08-26 | 2011-08-26 | EM-3330-MA | Emergency | Hurricane Irene | Hurricane | no Public Assistance recorded | same incident as DR-4028 | |
| 2011-03-07 | 2011-01-11 | DR-1959-MA | Major disaster | Severe Winter Storm and Snowstorm | Winter Weather | $3,091,794.98 | ||
| 2010-09-02 | 2010-09-01 | EM-3315-MA | Emergency | Hurricane Earl | Hurricane | $42,493.87 | ||
| 2010-05-03 | 2010-05-01 | EM-3312-MA | Emergency | Water Main Break | Non-natural, not counted | no Public Assistance recorded | ||
| 2010-03-29 | 2010-03-12 | DR-1895-MA | Major disaster | Severe Storms and Flooding | Inland Flooding | $3,400,456.04 | ||
| 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 | no Public Assistance recorded | ||
| 2005-02-17 | 2005-01-22 | EM-3201-MA | Emergency | Record and/or Near Record Snow | Winter Weather | $4,036,317.79 | ||
| 2004-04-21 | 2004-04-01 | DR-1512-MA | Major disaster | Flooding | Inland Flooding | PA not declared for this county | ||
| 2004-01-15 | 2003-12-06 | EM-3191-MA | Emergency | Snow | Winter Weather | $3,019,806.95 | ||
| 2003-03-11 | 2003-02-17 | EM-3175-MA | Emergency | Snow | Winter Weather | $2,146,207.81 | ||
| 2001-04-10 | 2001-03-05 | DR-1364-MA | Major disaster | Severe Storms and Flooding | Inland Flooding | PA not declared for this county | ||
| 2001-03-28 | 2001-03-05 | EM-3165-MA | Emergency | Snow | Winter Weather | $2,254,284.92 | ||
| 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 | ||
| 1987-04-18 | 1987-03-30 | DR-790-MA | Major disaster | Severe Storms & Flooding | Inland Flooding | PA not declared for this county | ||
| 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 | 71 | 9 | 3 | 1996 to 2026-06-30 | ||||
| Cold Wave | 9 | 0 | 0 | 1996 to 2026-06-30 | ||||
| Drought | 13 | 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 | 4 | 0 | 1955 to 2026-06-30 | ||||
| Heat Wave | 30 | 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 | 148 | 27 | 11 | 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 | 56 | 3 | 0 | 1996 to 2026-06-30 | ||||
| Strong Wind | 633 | 55 | 0 | 1955 to 2026-06-30 | Includes 189 High Wind and 190 Strong Wind records. | |||
| Tornado | 15 | 3 | 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 | 1 | 0 | 0 | 1996 to 2026-06-30 | ||||
| Winter Weather | 166 | 10 | 12 | 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 | Why listed |
|---|---|---|---|---|---|---|
| 2020-06-28 | Flash Flood | $30,000,000 property; $0 crops (2020 dollars) | 0, 0 | NORWOOD | B1-c worst recorded: Flash Flood, Flood, Lakeshore Flood | |
| 2016-02-05 | Heavy Snow | $100,000 property; $0 crops (zone total, 2016 dollars) | 2, 0 | NWS zone MAZ013 (WESTERN NORFOLK), zone-level | deaths or injuries recorded | |
| 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 | $3,500,000 property; $0 crops (zone total, 2011 dollars) | 0, 0 | NWS zone MAZ013 (WESTERN NORFOLK), zone-level | B1-c worst recorded: Hurricane, Tropical Storm, Tropical Depression | |
| 2009-05-24 | Lightning | $1,000,000 property; $0 crops (2009 dollars) | 0, 0 | EAST WALPOLE | B1-c worst recorded: Lightning | |
| 2007-02-03 | Extreme Cold/Wind Chill | $0 property; $0 crops (zone total, 2007 dollars) | 1, 0 | NWS zone MAZ015 (SUFFOLK), zone-level | B1-c worst recorded: Cold/Wind Chill, Extreme Cold/Wind Chill | |
| 2006-01-18 | High Wind | 85 kt (98 mph) measured gust | $20,000 property; crops not reported (zone total, 2006 dollars) | 0, 0 | NWS zone MAZ016 (EASTERN NORFOLK), zone-level | B1-c worst recorded: High Wind and Strong Wind |
| 1999-09-07 | Heat | damage not reported | 0, 0 | NWS zone MAZ016 (EASTERN NORFOLK), zone-level | B1-c worst recorded: Excessive Heat, Heat | |
| 1999-07-06 | Thunderstorm Wind | 70 kt (81 mph), measurement type not recorded | damage not reported | 0, 0 | WEYMOUTH | B1-c worst recorded: Thunderstorm Wind |
| 1999-07-05 | Heat | damage not reported | 2, 0 | NWS zone MAZ015 (SUFFOLK / ALSO PART OF NORFOLK), zone-level | deaths or injuries recorded | |
| 1972-08-09 | Tornado | F1, 4.9 mi path length (whole path, pre-1996), 30 yd wide | $25,000 property; crops not recorded (1972 dollars) | 1, 6 | location not recorded | deaths or injuries recorded |
| 1953-06-09 | Tornado | F3, 13.1 mi path length (whole path, pre-1996), 667 yd wide | $2,500,000 property; crops not recorded (1953 dollars) | 0, 15 | location not recorded | B1-c worst recorded: Tornado |
The full list is in the Excel file, sheet "B1-d Storm Events history" (1,230 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 | 7.92 | events per year at a location (modeled) | about 7.9 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 | 1.3 | event-days per year | about 1.3 days per year | Likely | Storm Events event-days in 6 of 30 years, 1996 to 2025 (20%) | 22.8 | 2005-11-12 to 2024-11-12 (19 years) | countywide | |
| Drought | 5.77 | event-days per year | about 5.77 days per year | Likely | Storm Events event-days in 4 of 30 years, 1996 to 2025 (13.3%) | 238 | 2000 to 2025 (25.25 years; D3 and D4 only) | countywide | |
| Earthquake | 0.00166 | annual probability at a location | chance a given location in the county has at least minor-damage shaking in a year: 0.166% | not shown | modeled | see B1-f | No descriptor (Storm Events does not record earthquakes). | ||
| Hail | 1.84 | events per year | about 1.84 per year | Highly likely | FEMA annualized frequency (modeled) | 74.9 (modeled) | 1986 to 2023 (38 years) | countywide | |
| Heat Wave | 6.07 | event-days per year | about 6.07 days per year | Likely | Storm Events event-days in 9 of 30 years, 1996 to 2025 (30%) | 93.6 | 2005-11-12 to 2024-11-12 (19 years) | countywide | |
| Hurricane | 0.178 | 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 | 1.78 | event-days per year | about 1.78 days per year | Storm Events event-days in 0 of 30 years, 1996 to 2025 (0%) | 115 | 1946-12-31 to 2014-02-12 (67 years) | countywide | No Storm Events ice storm record, 1996 to 2025 | |
| Inland Flooding | 2.86 | event-days per year | about 2.86 days per year | Likely | Storm Events event-days in 23 of 30 years, 1996 to 2025 (76.7%) | 80 | 1996 to 2023 (28 years) | see B1-f | |
| Landslide | 0.234 | events per year (modeled) | about 1 in 4 years | Likely | FEMA annualized frequency (modeled) | not shown | modeled | see B1-f | |
| Lightning | 21 | days per year with a strike | about 21 days per year | Highly likely | FEMA annualized frequency (modeled) | not shown | 1995 to 2023 (29 years; CONUS) | countywide | |
| Strong Wind | 0.917 | events per year | about 0.92 per year | Likely | FEMA annualized frequency (modeled) | 35 | 1986 to 2023 (38 years) | countywide | |
| Tornado | 0.0818 | events per year | about 1 in 12 years | Possible | 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 | 0.0000615 | annual probability at a location | chance a given location in the county burns in a year: 0.00615% | Possible | Storm Events records in 1 of 30 years, 1996 to 2025 (3.33%) | not shown | modeled | see B1-f | |
| Winter Weather | 13 | event-days per year | about 13 days per year | Highly likely | Storm Events event-days in 28 of 30 years, 1996 to 2025 (93.3%) | 228 | 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 | 25 | 30 | 0.833 |
| Hail | 2.00 in+ | 1996 to 2025 | 1 | 30 | 0.0333 |
| Thunderstorm Wind (counted as NRI Strong Wind) | 50-64 kt | 1996 to 2025 | 203 | 30 | 6.77 |
| Thunderstorm Wind (counted as NRI Strong Wind) | 65 kt+ | 1996 to 2025 | 2 | 30 | 0.0667 |
| Thunderstorm Wind (counted as NRI Strong Wind) | unmeasured or below 50 kt | 1996 to 2025 | 19 | 30 | 0.633 |
| Tornado | EF0-1 | 1996 to 2025 | 8 | 30 | 0.267 |
| 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 | 30 of 154 | 70.6 | 91.3 | 99.4 | Very High 2, Relatively High 8, Relatively Moderate 7, Relatively Low 7, Very Low 6, No Rating 124 |
| Cold Wave | 154 of 154 | 15.7 | 29.2 | 48.0 | Relatively Moderate 1, Relatively Low 152, Very Low 1 |
| Drought | 13 of 154 | 71.4 | 82.0 | 92.3 | Relatively Moderate 1, Relatively Low 7, Very Low 5, No Rating 141 |
| Earthquake | 153 of 154 | 20.2 | 55.9 | 80.6 | Relatively Moderate 3, Relatively Low 135, Very Low 15, No Rating 1 |
| Hail | 154 of 154 | 0.1 | 5.3 | 16.5 | Very Low 154 |
| Heat Wave | 154 of 154 | 1.7 | 28.3 | 63.0 | Relatively Moderate 2, Relatively Low 125, Very Low 27 |
| Hurricane | 154 of 154 | 11.3 | 74.9 | 83.6 | Relatively Moderate 28, Relatively Low 125, Very Low 1 |
| Ice Storm | 154 of 154 | 0.1 | 43.5 | 89.0 | Relatively Moderate 31, Relatively Low 81, Very Low 42 |
| Inland Flooding | 153 of 154 | 1.8 | 39.5 | 96.6 | Very High 1, Relatively High 12, Relatively Moderate 44, Relatively Low 72, Very Low 24, No Rating 1 |
| Landslide | 154 of 154 | 15.3 | 66.2 | 92.3 | Relatively Low 14, Very Low 140 |
| Lightning | 154 of 154 | 0.2 | 33.8 | 58.4 | Relatively Moderate 8, Relatively Low 134, Very Low 12 |
| Strong Wind | 154 of 154 | 0.2 | 24.4 | 47.4 | Relatively Low 119, Very Low 35 |
| Tornado | 154 of 154 | 0.3 | 27.8 | 46.7 | Relatively Low 57, Very Low 97 |
| Tsunami | 0 of 154 | Insufficient Data 154 | |||
| Wildfire | 134 of 154 | 18.7 | 39.6 | 82.7 | Relatively Low 7, Very Low 127, No Rating 20 |
| Winter Weather | 154 of 154 | 10.6 | 22.8 | 30.6 | Relatively Low 142, Very Low 12 |
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 |
|---|---|---|---|---|---|---|
| Braintree Town city | City | Approved, expires 2029-11-19 | FMA RL 0, SRL 2; any 18 | no Public Assistance recorded | 0 total; 0 since its plan | |
| Franklin Town city | Town | Expired on 2026-01-21 | FMA RL 0, SRL 0; any 5 | no Public Assistance recorded | 0 total; 0 since its plan | |
| Quincy city | City | Approved, expires 2030-12-04 | FMA RL 0, SRL 23; any 201 | $12,351,814.84 | 21 total; 0 since its plan | Includes $1,554,321.40 for declarations not counted as hazard incidents (DR-4496-MA). |
| Randolph Town city | Town | Expired on 2021-09-20 | FMA RL 0, SRL 0; any 2 | no Public Assistance recorded | 0 total; 0 since its plan | |
| Weymouth Town city | Town | Approved, expires 2026-11-28 | FMA RL 0, SRL 8; any 37 | no Public Assistance recorded | 0 total; 0 since its plan | |
| Avon town | Town | Approved, expires 2027-01-10 | FMA RL 0, SRL 0; any 0 | $691,952.55 | 6 total; 0 since its plan | Includes $183,936.42 for declarations not counted as hazard incidents (DR-4496-MA). |
| Bellingham town | Town | Expired on 2025-11-03 | FMA RL 0, SRL 0; any 0 | $1,042,761.09 | 11 total; 1 since its plan | Includes $222,949.13 for declarations not counted as hazard incidents (DR-4496-MA). |
| Brookline town | Town | Approved, expires 2028-11-27 | FMA RL 0, SRL 0; any 3 | $3,442,032.47 | 19 total; 0 since its plan | Includes $668,914.32 for declarations not counted as hazard incidents (DR-4496-MA, EM-3362-MA). |
| Canton town | Town | Expired on 2023-06-21 | FMA RL 0, SRL 0; any 2 | $2,540,048.24 | 4 total; 3 since its plan | Includes $271,708.52 for declarations not counted as hazard incidents (DR-4496-MA). |
| Cohasset town | Town | Expired on 2025-11-11 | FMA RL 0, SRL 2; any 10 | $798,281.49 | 5 total; 0 since its plan | Includes $267,563.28 for declarations not counted as hazard incidents (DR-4496-MA). |
| Dedham town | Town | Expired on 2026-02-23 | FMA RL 0, SRL 0; any 1 | $2,377,546.22 | 4 total; 1 since its plan | Includes $646,948 for declarations not counted as hazard incidents (DR-4496-MA). |
| Dover town | Town | Approved, expires 2027-09-25 | FMA RL 0, SRL 0; any 1 | $598,123.92 | 8 total; 0 since its plan | Includes $80,998.84 for declarations not counted as hazard incidents (DR-4496-MA). |
| Foxborough town | Town | Expired on 2025-10-14 | FMA RL 0, SRL 0; any 1 | $1,215,893.46 | 15 total; 0 since its plan | Includes $376,508.34 for declarations not counted as hazard incidents (DR-4496-MA). |
| Holbrook town | Town | No approved plan on record | FMA RL 0, SRL 0; any 5 | $897,157.84 | 9 total; no approved plan | Includes $369,848.44 for declarations not counted as hazard incidents (DR-4496-MA). |
| Medfield town | Town | Expired on 2024-09-19 | FMA RL 0, SRL 0; any 0 | $910,464.62 | 8 total; 4 since its plan | Includes $119,696.88 for declarations not counted as hazard incidents (DR-4496-MA). |
| Medway town | Town | Approved, expires 2030-01-12 | FMA RL 0, SRL 0; any 1 | $1,275,385.08 | 18 total; 0 since its plan | Includes $221,364.32 for declarations not counted as hazard incidents (DR-4496-MA). |
| Millis town | Town | Approved, expires 2030-11-12 | FMA RL 0, SRL 0; any 1 | $892,581.77 | 3 total; 0 since its plan | Includes $81,551.40 for declarations not counted as hazard incidents (DR-4496-MA). |
| Milton town | Town | Approved, expires 2027-01-06 | FMA RL 0, SRL 0; any 7 | $1,752,109.58 | 19 total; 3 since its plan | Includes $541,737.51 for declarations not counted as hazard incidents (DR-4496-MA). |
| Needham town | Town | Expired on 2026-01-21 | FMA RL 0, SRL 0; any 4 | $2,594,633.18 | 20 total; 2 since its plan | Includes $436,628.81 for declarations not counted as hazard incidents (DR-4496-MA). |
| Norfolk town | Town | Approved, expires 2029-02-27 | FMA RL 0, SRL 0; any 5 | $1,477,646.97 | 11 total; 0 since its plan | Includes $718,879.10 for declarations not counted as hazard incidents (DR-4496-MA). |
| Norwood town | Town | Approved, expires 2030-09-15 | FMA RL 0, SRL 0; any 2 | $2,854,039.44 | 6 total; 0 since its plan | Includes $725,610.65 for declarations not counted as hazard incidents (DR-4496-MA). |
| Plainville town | Town | Expired on 2013-04-02 | FMA RL 0, SRL 0; any 0 | $603,516.68 | 7 total; 4 since its plan | Includes $171,429.67 for declarations not counted as hazard incidents (DR-4496-MA). |
| Sharon town | Town | Approved, expires 2030-10-19 | FMA RL 0, SRL 0; any 1 | $1,107,280.13 | 13 total; 0 since its plan | Includes $204,793.02 for declarations not counted as hazard incidents (DR-4496-MA). |
| Stoughton town | Town | Approved, expires 2030-02-11 | FMA RL 0, SRL 0; any 1 | $2,190,729.29 | 16 total; 0 since its plan | Includes $418,674.79 for declarations not counted as hazard incidents (DR-4496-MA). |
| Walpole town | Town | Expired on 2022-05-31 | FMA RL 0, SRL 0; any 0 | $1,654,394.02 | 27 total; 2 since its plan | Includes $132,630.32 for declarations not counted as hazard incidents (DR-4496-MA). |
| Wellesley town | Town | Approved, expires 2029-02-22 | FMA RL 0, SRL 0; any 6 | $2,295,743.02 | 18 total; 0 since its plan | Includes $910,517.17 for declarations not counted as hazard incidents (DR-4496-MA, EM-3362-MA). |
| Westwood town | Town | Approved, expires 2029-04-11 | FMA RL 0, SRL 0; any 4 | $1,939,542.19 | 9 total; 0 since its plan | Includes $385,561.29 for declarations not counted as hazard incidents (DR-4496-MA). |
| Wrentham town | Town | Expired on 2023-11-26 | FMA RL 0, SRL 0; any 0 | $998,132.14 | 19 total; 4 since its plan | Includes $272,473.15 for declarations not counted as hazard incidents (DR-4496-MA). |
Repetitive-loss counts are for whole NFIP communities, which can extend beyond this county (see the note in B2-c).
School districts and special districts get a plan clock row only.
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 | $8,996,912,230 | n/a | 36,791 | $5,070,024 | n/a | $20,621 | 0.0564% | ||||
| Cold Wave | $167,152,963,713 | $6,394,921 | 725,648 | $2,308 | $689 | $3,321,296 | under 0.0001% | ||||
| Drought | n/a | $5,164,595 | n/a | n/a | $97,921 | n/a | 1.9% (agriculture) | NRI has no building exposure for this hazard; agriculture shown | |||
| Earthquake | $284,229,827,628 | n/a | 725,981 | $7,106,937 | n/a | $1,774,797 | 0.0025% | ||||
| Hail | $167,152,963,713 | $6,394,921 | 725,648 | $32,194 | $44 | $10,374 | under 0.0001% | ||||
| Heat Wave | $167,152,963,713 | $6,394,921 | 725,648 | $5 | $914 | $3,861,543 | under 0.0001% | ||||
| Hurricane | $167,128,274,976 | $6,394,921 | 725,420 | $15,130,182 | $51,197 | $446,768 | 0.00905% | ||||
| Ice Storm | $166,532,991,673 | n/a | 722,144 | $1,155,664 | n/a | $35,116 | 0.000694% | ||||
| Inland Flooding | $166,996,668,556 | $111,202 | 27,330 | $102,429,843 | $24 | $637,899 | 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 | $3,443,873,422 | n/a | 14,882 | $8,740 | n/a | $636 | 0.000254% | ||||
| Lightning | $167,152,963,713 | n/a | 725,648 | $202,168 | n/a | $1,049,609 | 0.000121% | ||||
| Strong Wind | $167,152,963,713 | $6,394,921 | 725,648 | $650,411 | under $1 | $488,760 | 0.000389% | ||||
| Tornado | $167,152,963,713 | $6,394,921 | 725,648 | $2,798,739 | $65 | $389,797 | 0.00167% | ||||
| Tsunami | n/a | n/a | n/a | n/a | n/a | n/a | NRI publishes no building exposure for this county | ||||
| Wildfire | $10,874,924,098 | $672,176 | 57,147 | $55,475 | $1 | $5,391 | 0.00051% | ||||
| Winter Weather | $167,152,963,713 | $6,394,921 | 725,648 | $56,415 | $3 | $24,851 | 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 | 725,648 |
| Building value (total, not at risk) | $167,152,963,713 |
| Agriculture value (total, not at risk) | $6,394,921 |
| NRI risk rating (all hazards) | Relatively Moderate |
| Expected annual loss, buildings and agriculture, all hazards | $134,849,962 |
| 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) | $12,067,457 |
| 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) | 0 | Severe repetitive loss, FMA definition (44 CFR 77.2) | 35 |
| Repetitive loss, NFIP insurance definition | 317 | Severe repetitive loss, NFIP insurance definition | 34 |
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 | 0 | 35 | 317 | 34 | 318 | 1 | 131 |
| of which: Braintree town | 0 | 2 | 18 | 2 | 18 | 0 | 5 |
| of which: Brookline town | 0 | 0 | 3 | 0 | 3 | 0 | 1 |
| of which: Canton town | 0 | 0 | 2 | 0 | 2 | 0 | 1 |
| of which: Cohasset town | 0 | 2 | 9 | 1 | 10 | 1 | 6 |
| of which: Dedham town | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
| of which: Dover town | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
| of which: Foxborough town | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| of which: Franklin town | 0 | 0 | 5 | 0 | 5 | 0 | 2 |
| of which: Medway town | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| of which: Millis town | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| of which: Milton town | 0 | 0 | 7 | 0 | 7 | 0 | 0 |
| of which: Norwood town | 0 | 0 | 2 | 0 | 2 | 0 | 0 |
| of which: Randolph town | 0 | 0 | 2 | 0 | 2 | 0 | 0 |
| of which: Sharon town | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
| of which: Stoughton town | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| of which: Wellesley town | 0 | 0 | 6 | 0 | 6 | 0 | 2 |
| of which: Weymouth town | 0 | 8 | 37 | 8 | 37 | 0 | 18 |
| of which: Holbrook town | 0 | 0 | 5 | 0 | 5 | 0 | 3 |
| of which: Needham town | 0 | 0 | 4 | 0 | 4 | 0 | 2 |
| of which: Norfolk town | 0 | 0 | 5 | 0 | 5 | 0 | 1 |
| of which: Quincy city | 0 | 23 | 201 | 23 | 201 | 0 | 87 |
| of which: Westwood town | 0 | 0 | 4 | 0 | 4 | 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 |
|---|---|---|---|---|---|---|---|---|
| Braintree Town city | 250233 | 0 | 2 | 18 | 2 | 18 | 0 | 5 |
| Franklin Town city | 250240 | 0 | 0 | 5 | 0 | 5 | 0 | 2 |
| Quincy city | 255219 | 0 | 23 | 201 | 23 | 201 | 0 | 87 |
| Randolph Town city | 250251 | 0 | 0 | 2 | 0 | 2 | 0 | 0 |
| Weymouth Town city | 250257 | 0 | 8 | 37 | 8 | 37 | 0 | 18 |
| Avon town | 250231 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Bellingham town | 250232 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Brookline town | 250234 | 0 | 0 | 3 | 0 | 3 | 0 | 1 |
| Canton town | 250235 | 0 | 0 | 2 | 0 | 2 | 0 | 1 |
| Cohasset town | 250236 | 0 | 2 | 9 | 1 | 10 | 1 | 6 |
| Dedham town | 250237 | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
| Dover town | 250238 | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
| Foxborough town | 250239 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| Holbrook town | 255212 | 0 | 0 | 5 | 0 | 5 | 0 | 3 |
| Medfield town | 250242 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Medway town | 250243 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| Millis town | 250244 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| Milton town | 250245 | 0 | 0 | 7 | 0 | 7 | 0 | 0 |
| Needham town | 255215 | 0 | 0 | 4 | 0 | 4 | 0 | 2 |
| Norfolk town | 255217 | 0 | 0 | 5 | 0 | 5 | 0 | 1 |
| Norwood town | 250248 | 0 | 0 | 2 | 0 | 2 | 0 | 0 |
| Plainville town | 250249 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Sharon town | 250252 | 0 | 0 | 1 | 0 | 1 | 0 | 1 |
| Stoughton town | 250253 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| Walpole town | 250254 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Wellesley town | 250255 | 0 | 0 | 6 | 0 | 6 | 0 | 2 |
| Westwood town | 255225 | 0 | 0 | 4 | 0 | 4 | 0 | 0 |
| Wrentham town | 250258 | 0 | 0 | 0 | 0 | 0 | 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 | 0 | 28 | 262 | 28 | 262 | 0 | 107 |
| 2 to 4 unit residential | 0 | 4 | 27 | 3 | 28 | 1 | 14 |
| other residential | 0 | 1 | 11 | 1 | 11 | 0 | 5 |
| non-residential | 0 | 2 | 17 | 2 | 17 | 0 | 5 |
| 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 0 properties are FMA repetitive loss but not NFIP repetitive loss, and 317 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). Norfolk County, MA: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-30; County FIPS 25021). Automated baseline. https://hazardplain.org/ma/25021/ 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