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 ($52,098,600 a year), Hurricane ($22,302,862) and Earthquake ($1,991,618).
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. Connecticut planning regions have no county-level plan in FEMA data; see each town's plan dates in the region.
Sources: 1, 2, 4, 6 (numbered list at the end)
Plan status for every jurisdiction listed in this planning region: 26 rows, in the section "Plan clock: Plan status for every jurisdiction listed in this planning region" 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 planning region
Source: 1
| Jurisdiction | Type | Status | Plan | Approved | Expires | Days to expirynegative = days since expiry | Notes |
|---|---|---|---|---|---|---|---|
| Groton city | City | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| Jewett City borough | Borough | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | this jurisdiction approved 2024-01-03 |
| New London city | City | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| Norwich city | City | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| Stonington borough | Borough | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| Bozrah town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| Colchester town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| East Lyme town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | this jurisdiction approved 2024-01-03 |
| Franklin town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| Griswold town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | this jurisdiction approved 2024-01-03 |
| Groton town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| Lebanon town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | this jurisdiction approved 2024-08-21 |
| Ledyard town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| Lisbon town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| Montville town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| North Stonington town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| Preston town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| Salem town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| Sprague town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| Stonington town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| Waterford town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | this jurisdiction approved 2024-01-03 |
| Windham town | Town | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | |
| Eastern Connecticut State | College/University | Expired on 2022-06-01 | Connecticut State Colleges and Universities (FEMA plan 102570) | 2017-06-02 | 2022-06-01 | -1,582 | |
| Quinebaug Valley Community | College/University | Expired on 2022-06-01 | Connecticut State Colleges and Universities (FEMA plan 102570) | 2017-06-02 | 2022-06-01 | -1,582 | |
| Southeastern Connecticut Council of Governments | Other | Approved, expires 2028-09-26 | Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036) | 2023-09-27 | 2028-09-26 | 727 | this jurisdiction approved 2025-06-11 |
| Three Rivers Community | College/University | Expired on 2022-06-01 | Connecticut State Colleges and Universities (FEMA plan 102570) | 2017-06-02 | 2022-06-01 | -1,582 |
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 Moderate | $52,052,335 | $60 | $46,204 | $52,098,600 | 160 | |
| 2 | Hurricane | Relatively High | Relatively High | $20,338,070 | $1,324,276 | $640,516 | $22,302,862 | 7 | |
| 3 | Earthquake | Relatively Low | Relatively Low | $1,690,321 | n/a | $301,297 | $1,991,618 | Storm Events does not record earthquakes. | |
| 4 | Tornado | Relatively Low | Relatively Low | $1,197,966 | $2,943 | $323,044 | $1,523,953 | 10 | |
| 5 | Coastal Flooding | Relatively Moderate | Relatively Moderate | $1,304,675 | n/a | $13,033 | $1,317,707 | 9 | |
| 6 | Heat Wave | Relatively Low | Relatively Low | $1 | $18,036 | $1,055,278 | $1,073,316 | 11 | |
| 7 | Cold Wave | Relatively Low | Relatively Low | $543 | $12,800 | $800,694 | $814,037 | 4 | |
| 8 | Strong Wind | Relatively Moderate | Relatively Moderate | $181,091 | $240 | $569,809 | $751,140 | 395 | Includes 67 High Wind and 53 Strong Wind records (NOAA non-thunderstorm wind types, outside NRI's Strong Wind definition). |
| 9 | Lightning | Relatively Moderate | Relatively Moderate | $33,568 | n/a | $642,963 | $676,531 | 25 | |
| 10 | Ice Storm | Relatively Moderate | Relatively Moderate | $273,533 | n/a | $121,371 | $394,904 | 3 | |
| 11 | Hail | Relatively Low | Relatively Low | $9,662 | $5,414 | $226,588 | $241,664 | 93 | |
| 12 | Winter Weather | Relatively Moderate | Relatively Moderate | $29,116 | $68 | $170,688 | $199,871 | 215 | |
| 13 | Drought | Relatively Low | Relatively Low | n/a | $36,156 | n/a | $36,156 | 10 | |
| 14 | Wildfire | Very Low | Very Low | $22,711 | $17 | $4,961 | $27,689 | 0 | No recorded events in Storm Events since 1996 (data through 2026-06-30). |
| 15 | Landslide | Relatively Low | Relatively Low | $10,100 | n/a | $1,996 | $12,096 | 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 6967.01 (Relatively Low, 75.7); tract 8003 (Relatively Low, 75.2); tract 8703 (Relatively Low, 70.8) |
| Hurricane | tract 8701 (Relatively High, 93.5); tract 8003 (Relatively High, 91.6); tract 7151 (Relatively High, 91.2) |
| Landslide | tract 7011 (Relatively Low, 92.6); tract 7131 (Relatively Low, 92.4); tract 7001 (Relatively Low, 91.0) |
| Tornado | tract 8003 (Relatively Low, 52.2); tract 8701 (Relatively Low, 49.1); tract 6967.01 (Relatively Low, 48.5) |
| Tsunami | no tract has a National Risk Index rating for this hazard |
| Wildfire | tract 7141.04 (Relatively Low, 72.3); tract 7141.03 (Relatively Low, 70.8); tract 7151 (Relatively Low, 69.6) |
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 6967.01 is Census Tract 6967.01). 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) | 9 records, 1996 to 2024 (9 zone-level) | No damage reported in 9 records. | Countywide (zone-level records). | Flood depth: see the FEMA Flood Insurance Rate Map. | ||
| Cold/Wind Chill, Extreme Cold/Wind Chill | wind chill | 4 records, 2000 to 2023 (4 zone-level) | 1 day to 2 days (median 1.5 days); 4 with a recorded value | 2 consecutive days, 2004-01-15 to 2004-01-16, 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) | 10 records, 2002 to 2017 (10 zone-level) | 8 days to 124 days (median 44.5 days); 4 with a recorded value | 124 days (about 4.1 months), 2016-10-01 to 2017-02-01, a run of 5 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) | 111 records, 1963 to 2025 | 0.75 in to 2.75 in (median 1 in); 111 with a recorded value | 2.75 in hail, 1969-05-29 | Hail, 2025-07-03, $5,000 property; $0 crops (2025 dollars) | Event records naming jurisdictions in the plan: Norwich city (8 records), Colchester town (5 records), Windham town (4 records), Franklin town (3 records), Jewett City borough (3 records), New London city (2 records), Preston town (2 records), North Stonington town (1 record), Salem town (1 record), Waterford town (1 record). | |
| Excessive Heat, Heat | heat index (in event narratives) | 11 records, 1999 to 2019 (11 zone-level) | 1 day to 3 days (median 2 days); 7 with a recorded value | 3 consecutive days, 2002-07-02 to 2002-07-04, zone-level | Countywide (zone-level records). | ||
| Hurricane, Tropical Storm, Tropical Depression | Saffir-Simpson | 7 records, 2008 to 2021 (7 zone-level) | Strongest recorded: Tropical Storm record, 2011-08-28, $20,000,000 property; $0 crops (2011 dollars); NWS zone CTZ004 | 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) | 3 records, 1998 to 2011 (3 zone-level) | No damage reported in 3 records. | Countywide (zone-level records). | |||
| Flash Flood, Flood, Lakeshore Flood | damage and flood days (flood depth: FIRM) | 160 records, 1996 to 2024 (8 zone-level) | Flood, 2010-03-30, $4,000,000 property; $0 crops (2010 dollars) | Event records naming jurisdictions in the plan: New London city (17 records), Norwich city (9 records), Windham town (6 records), Lebanon town (5 records), Jewett City borough (3 records), Colchester town (2 records), Groton city (2 records), Groton town (2 records), North Stonington town (2 records), Stonington borough (2 records); and 5 more jurisdictions (see the Excel file). Zone-level records (8) 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) | 25 records, 1997 to 2025 | Lightning, 1997-06-19, damage not reported, 1 direct death | Lightning, 2016-08-13, $15,000 property; $0 crops (2016 dollars) | Event records naming jurisdictions in the plan: Norwich city (5 records), Stonington borough (3 records), Stonington town (3 records), Griswold town (1 record), North Stonington town (1 record), Preston town (1 record). | Storm Events lists lightning with damage or casualties. | |
| High Wind and Strong Wind (outside NRI's Strong Wind definition) | wind speed (kt and mph) | 120 records, 1996 to 2026 (120 zone-level) | 28 kt (32 mph) to 65 kt (75 mph) (median 50 kt (58 mph)); 95 with a recorded value | 65 kt (75 mph) measured gust, High Wind, 2012-10-29; NWS zone CTZ012 | High Wind, 2012-10-29, $1,000,000 property; $0 crops (zone total, 2012 dollars) | Countywide (zone-level records). | |
| Thunderstorm Wind | wind speed (kt and mph) | 320 records, 1956 to 2026 | 40 kt (46 mph) to 74 kt (85 mph) (median 50 kt (58 mph)); 279 with a recorded value | 74 kt (85 mph) estimated gust, Thunderstorm Wind, 2008-07-02 | Event records naming jurisdictions in the plan: Colchester town (12 records), Lebanon town (11 records), Norwich city (11 records), Windham town (11 records), Franklin town (10 records), Salem town (6 records), Jewett City borough (5 records), North Stonington town (5 records), Groton city (2 records), Groton town (2 records); and 6 more jurisdictions (see the Excel file). | ||
| Tornado | Enhanced Fujita (Fujita before Feb 2007) | 13 records, 1985 to 2023 | F/EF0 to F/EF1 (median F/EF1); 13 with a recorded value | F1 tornado, 1985-06-24, 10 mi path length (whole path, pre-1996), 100 yd wide, $2,500,000 property; crops not recorded (1985 dollars) | Event records naming jurisdictions in the plan: Montville 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) | 215 records, 1996 to 2026 (215 zone-level) | Heavy Snow, 1996-12-07, $1,000,000 property; crops not reported (1996 dollars); NWS zone CTZ004 | 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: 58 declarations covering 23 separate hazard incidents counted in this packet (declarations for the same incident count once; non-natural and evacuation-only declarations are not counted).
Connecticut planning regions have no county-level plan in FEMA data; see each town's plan dates in the region.
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 |
|---|---|---|---|---|---|---|---|---|
| 2024-01-13 | 2024-01-10 | EM-3604-CT | Emergency | Severe Storms, Flooding, and a Potential Dam Breach | Inland Flooding | within last 5 years | former New London County total, not this region: no Public Assistance recorded | |
| 2021-10-30 | 2021-09-01 | DR-4629-CT | Major disaster | Remnants of Hurricane Ida | Hurricane | within last 5 years | former New London County total, not this region: no Public Assistance recorded | |
| 2021-08-22 | 2021-08-21 | EM-3564-CT | Emergency | Hurricane Henri | Hurricane | former Windham County total, not this region: no Public Assistance recorded | ||
| 2021-08-22 | 2021-08-21 | EM-3564-CT | Emergency | Hurricane Henri | Hurricane | former New London County total, not this region: $5,339.02 | ||
| 2021-01-12 | 2020-08-04 | DR-4580-CT | Major disaster | Tropical Storm Isaias | Hurricane | former Windham County total, not this region: $235,171.29 | ||
| 2021-01-12 | 2020-08-04 | DR-4580-CT | Major disaster | Tropical Storm Isaias | Hurricane | former New London County total, not this region: $1,074,018.28 | ||
| 2020-08-06 | 2020-08-04 | EM-3535-CT | Emergency | Tropical Storm Isaias | Hurricane | same incident as DR-4580; former Windham County total, not this region: no Public Assistance recorded | ||
| 2020-08-06 | 2020-08-04 | EM-3535-CT | Emergency | Tropical Storm Isaias | Hurricane | same incident as DR-4580; former New London County total, not this region: no Public Assistance recorded | ||
| 2020-03-28 | 2020-01-20 | DR-4500-CT | Major disaster | COVID-19 Pandemic | Non-natural, not counted | former Windham County total, not this region: $2,030,946.15 | ||
| 2020-03-28 | 2020-01-20 | DR-4500-CT | Major disaster | COVID-19 Pandemic | Non-natural, not counted | former New London County total, not this region: $27,151,096.56 | ||
| 2020-03-13 | 2020-01-20 | EM-3439-CT | Emergency | COVID-19 | Non-natural, not counted | same incident as DR-4500; former Windham County total, not this region: no Public Assistance recorded | ||
| 2020-03-13 | 2020-01-20 | EM-3439-CT | Emergency | COVID-19 | Non-natural, not counted | same incident as DR-4500; former New London County total, not this region: no Public Assistance recorded | ||
| 2018-12-05 | 2018-09-25 | DR-4410-CT | Major disaster | Severe Storms and Flooding | Inland Flooding | former New London County total, not this region: $491,639.85 | ||
| 2015-04-08 | 2015-01-26 | DR-4213-CT | Major disaster | Severe Winter Storm and Snowstorm | Winter Weather | former Windham County total, not this region: $667,486.34 | ||
| 2015-04-08 | 2015-01-26 | DR-4213-CT | Major disaster | Severe Winter Storm and Snowstorm | Winter Weather | former New London County total, not this region: $1,856,741.77 | ||
| 2013-03-21 | 2013-02-08 | DR-4106-CT | Major disaster | Severe Winter Storm and Snowstorm | Winter Weather | former Windham County total, not this region: $458,100.76 | ||
| 2013-03-21 | 2013-02-08 | DR-4106-CT | Major disaster | Severe Winter Storm and Snowstorm | Winter Weather | former New London County total, not this region: $1,798,115.14 | ||
| 2013-02-10 | 2013-02-08 | EM-3361-CT | Emergency | Severe Winter Storm | Winter Weather | same incident as DR-4106; former Windham County total, not this region: no Public Assistance recorded | ||
| 2013-02-10 | 2013-02-08 | EM-3361-CT | Emergency | Severe Winter Storm | Winter Weather | same incident as DR-4106; former New London County total, not this region: no Public Assistance recorded | ||
| 2012-10-30 | 2012-10-27 | DR-4087-CT | Major disaster | Hurricane Sandy | Hurricane | former Windham County total, not this region: $154,388.96 | ||
| 2012-10-30 | 2012-10-27 | DR-4087-CT | Major disaster | Hurricane Sandy | Hurricane | former New London County total, not this region: $5,508,478.74 | ||
| 2012-10-28 | 2012-10-27 | EM-3353-CT | Emergency | Hurricane Sandy | Hurricane | same incident as DR-4087; former Windham County total, not this region: no Public Assistance recorded | ||
| 2012-10-28 | 2012-10-27 | EM-3353-CT | Emergency | Hurricane Sandy | Hurricane | same incident as DR-4087; former New London County total, not this region: no Public Assistance recorded | ||
| 2011-11-17 | 2011-10-29 | DR-4046-CT | Major disaster | Severe Storm | Hazard not mapped (severe storm title names no single hazard); not counted | former Windham County total, not this region: $122,595.37 | ||
| 2011-10-31 | 2011-10-29 | EM-3342-CT | Emergency | Severe Storm | Hazard not mapped (severe storm title names no single hazard); not counted | same incident as DR-4046; former Windham County total, not this region: no Public Assistance recorded | ||
| 2011-10-31 | 2011-10-29 | EM-3342-CT | Emergency | Severe Storm | Hazard not mapped (severe storm title names no single hazard); not counted | same incident as DR-4046; former New London County total, not this region: $26,307.80 | ||
| 2011-09-02 | 2011-08-27 | DR-4023-CT | Major disaster | Tropical Storm Irene | Hurricane | former Windham County total, not this region: $599,278.65 | ||
| 2011-09-02 | 2011-08-27 | DR-4023-CT | Major disaster | Tropical Storm Irene | Hurricane | former New London County total, not this region: $5,387,536.15 | ||
| 2011-08-27 | 2011-08-26 | EM-3331-CT | Emergency | Hurricane Irene | Hurricane | same incident as DR-4023; former Windham County total, not this region: no Public Assistance recorded | ||
| 2011-08-27 | 2011-08-26 | EM-3331-CT | Emergency | Hurricane Irene | Hurricane | same incident as DR-4023; former New London County total, not this region: no Public Assistance recorded | ||
| 2011-03-03 | 2011-01-11 | DR-1958-CT | Major disaster | Snowstorm | Winter Weather | former New London County total, not this region: $1,002,297.46 | ||
| 2010-04-23 | 2010-03-12 | DR-1904-CT | Major disaster | Severe Storms and Flooding | Inland Flooding | former Windham County total, not this region: no Public Assistance recorded | ||
| 2010-04-23 | 2010-03-12 | DR-1904-CT | Major disaster | Severe Storms and Flooding | Inland Flooding | former New London County total, not this region: $5,063,960.60 | ||
| 2007-05-11 | 2007-04-15 | DR-1700-CT | Major disaster | Severe Storms and Flooding | Inland Flooding | former Windham County total, not this region: no Public Assistance recorded | ||
| 2007-05-11 | 2007-04-15 | DR-1700-CT | Major disaster | Severe Storms and Flooding | Inland Flooding | former New London County total, not this region: no Public Assistance recorded | ||
| 2006-05-02 | 2006-02-11 | EM-3266-CT | Emergency | Snow | Winter Weather | former Windham County total, not this region: $259,952.34 | ||
| 2005-12-16 | 2005-10-14 | DR-1619-CT | Major disaster | Severe Storms and Flooding | Inland Flooding | former Windham County total, not this region: $412,946.32 | ||
| 2005-12-16 | 2005-10-14 | DR-1619-CT | Major disaster | Severe Storms and Flooding | Inland Flooding | former New London County total, not this region: $435,040.46 | ||
| 2005-09-13 | 2005-08-29 | EM-3246-CT | Emergency | Hurricane Katrina Evacuation | Hurricane: evacuation support, not a local hazard event; not counted | former Windham County total, not this region: no Public Assistance recorded | ||
| 2005-09-13 | 2005-08-29 | EM-3246-CT | Emergency | Hurricane Katrina Evacuation | Hurricane: evacuation support, not a local hazard event; not counted | former New London County total, not this region: no Public Assistance recorded | ||
| 2005-02-17 | 2005-01-22 | EM-3200-CT | Emergency | Record Snow | Winter Weather | former Windham County total, not this region: $286,231.71 | ||
| 2005-02-17 | 2005-01-22 | EM-3200-CT | Emergency | Record Snow | Winter Weather | former New London County total, not this region: $784,972.33 | ||
| 2004-01-15 | 2003-12-05 | EM-3192-CT | Emergency | Snow | Winter Weather | former Windham County total, not this region: $236,943.06 | ||
| 2004-01-15 | 2003-12-05 | EM-3192-CT | Emergency | Snow | Winter Weather | former New London County total, not this region: $600,136.75 | ||
| 2003-03-11 | 2003-02-17 | EM-3176-CT | Emergency | Snow | Winter Weather | former Windham County total, not this region: $172,632.90 | ||
| 2003-03-11 | 2003-02-17 | EM-3176-CT | Emergency | Snow | Winter Weather | former New London County total, not this region: $440,704.05 | ||
| 1996-01-24 | 1996-01-07 | DR-1092-CT | Major disaster | Blizzard 0F 96 | Winter Weather | former Windham County total, not this region: no Public Assistance recorded | ||
| 1996-01-24 | 1996-01-07 | DR-1092-CT | Major disaster | Blizzard 0F 96 | Winter Weather | former New London County total, not this region: no Public Assistance recorded | ||
| 1993-03-16 | 1993-03-13 | EM-3098-CT | Emergency | Severe Winds & Blizzard, Record Snowfall | Winter Weather | former Windham County total, not this region: no Public Assistance recorded | ||
| 1993-03-16 | 1993-03-13 | EM-3098-CT | Emergency | Severe Winds & Blizzard, Record Snowfall | Winter Weather | former New London County total, not this region: no Public Assistance recorded | ||
| 1991-08-30 | 1991-08-19 | DR-916-CT | Major disaster | Hurricane Bob | Hurricane | former Windham County total, not this region: no Public Assistance recorded | ||
| 1991-08-30 | 1991-08-19 | DR-916-CT | Major disaster | Hurricane Bob | Hurricane | former New London County total, not this region: no Public Assistance recorded | ||
| 1985-10-11 | 1985-09-27 | DR-747-CT | Major disaster | Hurricane Gloria | Hurricane | former Windham County total, not this region: no Public Assistance recorded | ||
| 1985-10-11 | 1985-09-27 | DR-747-CT | Major disaster | Hurricane Gloria | Hurricane | former New London County total, not this region: no Public Assistance recorded | ||
| 1982-06-14 | 1982-06-14 | DR-661-CT | Major disaster | Severe Storms & Flooding | Inland Flooding | former Windham County total, not this region: no Public Assistance recorded | ||
| 1982-06-14 | 1982-06-14 | DR-661-CT | Major disaster | Severe Storms & Flooding | Inland Flooding | former New London County total, not this region: no Public Assistance recorded | ||
| 1978-02-07 | 1978-02-07 | EM-3060-CT | Emergency | Blizzard & Snowstorms | Winter Weather | former Windham County total, not this region: no Public Assistance recorded | ||
| 1978-02-07 | 1978-02-07 | EM-3060-CT | Emergency | Blizzard & Snowstorms | Winter Weather | former New London County total, not this region: no Public Assistance recorded |
Old-county PA is never summed into a region total.
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-42-CT | Major disaster | Hurricane, Torrential Rain & Floods | Hurricane (primary); also designated: Inland Flooding |
| 1954-09-17 | 1954-09-17 | DR-25-CT | Major disaster | Hurricanes | Hurricane (primary); also designated: Inland Flooding |
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.
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 | 9 | 2 | 0 | 1996 to 2026-06-30 | ||||
| Cold Wave | 4 | 1 | 0 | 1996 to 2026-06-30 | ||||
| Drought | 10 | 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 | 111 | 11 | 0 | 1955 to 2026-06-30 | ||||
| Heat Wave | 11 | 0 | 0 | 1996 to 2026-06-30 | ||||
| Hurricane | 7 | 0 | 7 | 1996 to 2026-06-30 | ||||
| Ice Storm | 3 | 0 | 0 | 1996 to 2026-06-30 | ||||
| Inland Flooding | 160 | 19 | 6 | 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 | 25 | 4 | 0 | 1996 to 2026-06-30 | ||||
| Strong Wind | 440 | 89 | 0 | 1955 to 2026-06-30 | Includes 67 High Wind and 53 Strong Wind records. | |||
| Tornado | 13 | 4 | 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 | 215 | 28 | 10 | 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 |
|---|---|---|---|---|---|---|
| 2017-09-06 | Thunderstorm Wind | 56 kt (64 mph) estimated gust | $15,000 property; crops not reported (2017 dollars) | 1, 1 | RIDGEWOOD (former New London County record) | deaths or injuries recorded |
| 2015-08-04 | Thunderstorm Wind | 52 kt (60 mph) estimated gust | $10,000 property; crops not reported (2015 dollars) | 1, 0 | WEST MYSTIC (former New London County record) | deaths or injuries recorded |
| 2012-10-29 | High Wind | 65 kt (75 mph) measured gust | $300,000 property; $0 crops (zone total, 2012 dollars) | 0, 0 | NWS zone CTZ012 (SOUTHERN NEW LONDON), zone-level | B1-c worst recorded: High Wind and Strong Wind |
| 2011-08-28 | Tropical Storm | $20,000,000 property; $0 crops (zone total, 2011 dollars) | 0, 0 | NWS zone CTZ004 (WINDHAM), zone-level | B1-c worst recorded: Hurricane, Tropical Storm, Tropical Depression | |
| 2010-03-30 | Flood | $4,000,000 property; $0 crops (2010 dollars) | 0, 0 | CLARKS FALLS (former New London County record) | B1-c worst recorded: Flash Flood, Flood, Lakeshore Flood | |
| 2008-07-02 | Thunderstorm Wind | 74 kt (85 mph) estimated gust | $100,000 property; $0 crops (2008 dollars) | 0, 0 | NORTHWICHTOWN (former New London County record) | B1-c worst recorded: Thunderstorm Wind |
| 2005-10-15 | Flood | $600,000 property; crops not reported (zone total, 2005 dollars) | 1, 0 | NWS zone CTZ004 (WINDHAM), zone-level | deaths or injuries recorded | |
| 2004-01-15 | Cold/Wind Chill | damage not reported | 0, 0 | NWS zone CTZ008 (NORTHERN NEW LONDON), zone-level | B1-c worst recorded: Cold/Wind Chill, Extreme Cold/Wind Chill | |
| 2002-07-02 | Heat | damage not reported | 0, 0 | NWS zone CTZ008 (NORTHERN NEW LONDON), zone-level | B1-c worst recorded: Excessive Heat, Heat | |
| 1997-06-19 | Lightning | damage not reported | 1, 0 | GRISWOLD (former New London County record) | B1-c worst recorded: Lightning | |
| 1985-06-24 | Tornado | F1, 10 mi path length (whole path, pre-1996), 100 yd wide | $2,500,000 property; crops not recorded (1985 dollars) | 0, 0 | location not recorded (former Windham County record) | B1-c worst recorded: Tornado |
| 1969-05-29 | Hail | 2.75 in | damage not recorded (pre-1996 record) | 0, 0 | location not recorded (former New London County record) | B1-c worst recorded: Hail |
The full list is in the Excel file, sheet "B1-d Storm Events history" (1,008 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 | 3.72 | events per year at a location (modeled) | about 3.7 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 | 0.904 | event-days per year | about 0.904 days per year | Likely | Storm Events event-days in 3 of 30 years, 1996 to 2025 (10%) | 15.5 | 2005-11-12 to 2024-11-12 (19 years) | countywide | |
| Drought | 1.09 | event-days per year | about 1.09 days per year | Likely | Storm Events event-days in 4 of 30 years, 1996 to 2025 (13.3%) | 91 | 2000 to 2025 (25.25 years; D3 and D4 only) | countywide | |
| Earthquake | 0.00114 | annual probability at a location | chance a given location in the county has at least minor-damage shaking in a year: 0.114% | not shown | modeled | see B1-f | No descriptor (Storm Events does not record earthquakes). | ||
| Hail | 1.75 | events per year | about 1.75 per year | Highly likely | FEMA annualized frequency (modeled) | 70.1 (modeled) | 1986 to 2023 (38 years) | countywide | |
| Heat Wave | 4.46 | event-days per year | about 4.46 days per year | Likely | Storm Events event-days in 7 of 30 years, 1996 to 2025 (23.3%) | 66.3 | 2005-11-12 to 2024-11-12 (19 years) | countywide | |
| Hurricane | 0.186 | events per year | about 1 in 5 years | Likely | FEMA annualized frequency (modeled) | 68 | 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 | 1.74 | event-days per year | about 1.74 days per year | Likely | Storm Events event-days in 3 of 30 years, 1996 to 2025 (10%) | 110 | 1946-12-31 to 2014-02-12 (67 years) | countywide | |
| Inland Flooding | 2.25 | event-days per year | about 2.25 days per year | Likely | Storm Events event-days in 26 of 30 years, 1996 to 2025 (86.7%) | 63 | 1996 to 2023 (28 years) | see B1-f | |
| Landslide | 0.463 | events per year (modeled) | about 1 in 2 years | Likely | FEMA annualized frequency (modeled) | not shown | modeled | see B1-f | |
| Lightning | 23.2 | days per year with a strike | about 23.2 days per year | Highly likely | FEMA annualized frequency (modeled) | not shown | 1995 to 2023 (29 years; CONUS) | countywide | |
| Strong Wind | 1.63 | events per year | about 1.63 per year | Highly likely | FEMA annualized frequency (modeled) | 60 | 1986 to 2023 (38 years) | countywide | |
| Tornado | 0.163 | events per year | about 1 in 6 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 | 0.0000667 | annual probability at a location | chance a given location in the county burns in a year: 0.00667% | 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 | 13.3 | event-days per year | about 13.3 days per year | Highly likely | Storm Events event-days in 29 of 30 years, 1996 to 2025 (96.7%) | 229 | 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 | 49 | 30 | 1.63 |
| Hail | 2.00 in+ | 1996 to 2025 | 0 | 30 | 0 |
| Thunderstorm Wind (counted as NRI Strong Wind) | 50-64 kt | 1996 to 2025 | 263 | 30 | 8.77 |
| 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 | 6 | 30 | 0.2 |
| Tornado | EF0-1 | 1996 to 2025 | 10 | 30 | 0.333 |
| 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 | 40 of 67 | 69.8 | 84.0 | 97.8 | Relatively High 2, Relatively Moderate 13, Relatively Low 17, Very Low 8, No Rating 21, Not Applicable 6 |
| Cold Wave | 67 of 67 | 17.2 | 24.0 | 47.1 | Relatively Low 63, Very Low 4 |
| Drought | 26 of 67 | 67.9 | 73.5 | 86.4 | Relatively Low 7, Very Low 19, No Rating 41 |
| Earthquake | 67 of 67 | 18.3 | 44.3 | 75.7 | Relatively Low 37, Very Low 30 |
| Hail | 67 of 67 | 11.3 | 35.7 | 56.9 | Relatively Low 27, Very Low 40 |
| Heat Wave | 67 of 67 | 3.1 | 18.9 | 55.4 | Relatively Low 39, Very Low 28 |
| Hurricane | 67 of 67 | 74.0 | 85.8 | 93.5 | Relatively High 8, Relatively Moderate 57, Relatively Low 2 |
| Ice Storm | 67 of 67 | 6.7 | 47.2 | 85.3 | Relatively Moderate 6, Relatively Low 42, Very Low 19 |
| Inland Flooding | 67 of 67 | 3.1 | 58.3 | 93.4 | Relatively High 12, Relatively Moderate 30, Relatively Low 18, Very Low 7 |
| Landslide | 67 of 67 | 26.7 | 73.5 | 92.6 | Relatively Low 22, Very Low 45 |
| Lightning | 67 of 67 | 11.2 | 42.8 | 71.3 | Relatively Moderate 20, Relatively Low 44, Very Low 3 |
| Strong Wind | 67 of 67 | 12.2 | 36.2 | 64.1 | Relatively Moderate 4, Relatively Low 60, Very Low 3 |
| Tornado | 67 of 67 | 7.6 | 31.1 | 52.2 | Relatively Low 42, Very Low 25 |
| Tsunami | 0 of 67 | Not Applicable 6, Insufficient Data 61 | |||
| Wildfire | 66 of 67 | 21.9 | 45.1 | 72.3 | Relatively Low 5, Very Low 61, No Rating 1 |
| Winter Weather | 67 of 67 | 24.0 | 51.0 | 75.1 | Relatively Moderate 40, Relatively Low 27 |
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 |
|---|---|---|---|---|---|---|
| Groton city | City | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 4 | $1,641,907.94 | 4 total; 0 since its plan | |
| Jewett City borough | Borough | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 0 | no Public Assistance recorded | 11 total; 1 since its plan | |
| New London city | City | Approved, expires 2028-09-26 | FMA RL 1, SRL 2; any 17 | $1,277,944.28 | 20 total; 0 since its plan | Includes $0 for declarations not counted as hazard incidents (DR-4500-CT). |
| Norwich city | City | Approved, expires 2028-09-26 | FMA RL 0, SRL 1; any 16 | $4,015,572.04 | 33 total; 0 since its plan | Includes $389,501.73 for declarations not counted as hazard incidents (DR-4500-CT). |
| Stonington borough | Borough | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 3 | $123,121.45 | 7 total; 0 since its plan | |
| Bozrah town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 0 | $38,997.25 | 0 total; 0 since its plan | |
| Colchester town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 0 | $723,510.91 | 19 total; 0 since its plan | Includes $21,745.25 for declarations not counted as hazard incidents (DR-4500-CT, EM-3342-CT). |
| East Lyme town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 2; any 22 | $2,991,177.26 | 1 total; 0 since its plan | |
| Franklin town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 1 | $144,890.47 | 13 total; 3 since its plan | |
| Griswold town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 0 | $588,918.99 | 2 total; 0 since its plan | Includes $4,911.51 for declarations not counted as hazard incidents (EM-3342-CT). |
| Groton town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 6 | $1,472,530.04 | 4 total; 0 since its plan | Includes $63,754.79 for declarations not counted as hazard incidents (DR-4500-CT). |
| Lebanon town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 0 | $595,089.06 | 16 total; 0 since its plan | Includes $48,899.48 for declarations not counted as hazard incidents (DR-4500-CT). |
| Ledyard town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 3 | $552,582.45 | 0 total; 0 since its plan | Includes $36,059.73 for declarations not counted as hazard incidents (DR-4500-CT). |
| Lisbon town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 0 | $130,209.52 | 0 total; 0 since its plan | |
| Montville town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 2 | $884,066.23 | 4 total; 1 since its plan | Includes $47,986.12 for declarations not counted as hazard incidents (DR-4500-CT). |
| North Stonington town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 2 | $1,958,014.14 | 9 total; 2 since its plan | Includes $27,389.76 for declarations not counted as hazard incidents (DR-4500-CT). |
| Preston town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 0 | $201,732.33 | 4 total; 0 since its plan | |
| Salem town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 0 | $221,664.53 | 7 total; 0 since its plan | Includes $4,254 for declarations not counted as hazard incidents (DR-4500-CT). |
| Sprague town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 0 | no Public Assistance recorded | 0 total; 0 since its plan | |
| Stonington town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 1; any 16 | $1,049,272.03 | 7 total; 0 since its plan | Includes $21,435.06 for declarations not counted as hazard incidents (DR-4500-CT). |
| Waterford town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 10 | $2,281,796.62 | 3 total; 0 since its plan | Includes $101,996.52 for declarations not counted as hazard incidents (DR-4500-CT). |
| Windham town | Town | Approved, expires 2028-09-26 | FMA RL 0, SRL 0; any 0 | $365,677.85 | 21 total; 1 since its plan | Includes $5,316.84 for declarations not counted as hazard incidents (DR-4046-CT). |
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.
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.
Connecticut planning regions have no county-level plan in FEMA data; see each town's plan dates in the region.
- 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 | $5,500,393,195 | n/a | 19,031 | $1,304,675 | n/a | $13,033 | 0.0237% | ||||
| Cold Wave | $58,856,813,032 | $166,311,192 | 280,193 | $543 | $12,800 | $800,694 | under 0.0001% | ||||
| Drought | n/a | $61,375,390 | n/a | n/a | $36,156 | n/a | 0.0589% (agriculture) | NRI has no building exposure for this hazard; agriculture shown | |||
| Earthquake | $101,922,982,793 | n/a | 280,430 | $1,690,321 | n/a | $301,297 | 0.00166% | ||||
| Hail | $58,884,661,758 | $166,311,192 | 280,316 | $9,662 | $5,414 | $226,588 | under 0.0001% | ||||
| Heat Wave | $58,856,813,032 | $166,311,192 | 280,193 | $1 | $18,036 | $1,055,278 | under 0.0001% | ||||
| Hurricane | $58,883,551,150 | $166,311,192 | 280,307 | $20,338,070 | $1,324,276 | $640,516 | 0.0345% | ||||
| Ice Storm | $58,374,657,487 | n/a | 277,074 | $273,533 | n/a | $121,371 | 0.000469% | ||||
| Inland Flooding | $58,686,222,875 | $6,518,761 | 10,101 | $52,052,335 | $60 | $46,204 | 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 | $2,018,040,323 | n/a | 9,830 | $10,100 | n/a | $1,996 | 0.0005% | ||||
| Lightning | $58,884,661,758 | n/a | 280,316 | $33,568 | n/a | $642,963 | under 0.0001% | ||||
| Strong Wind | $58,884,661,758 | $166,311,192 | 280,316 | $181,091 | $240 | $569,809 | 0.000308% | ||||
| Tornado | $58,884,661,758 | $166,311,192 | 280,316 | $1,197,966 | $2,943 | $323,044 | 0.00203% | ||||
| Tsunami | n/a | n/a | n/a | n/a | n/a | n/a | NRI publishes no building exposure for this county | ||||
| Wildfire | $6,020,609,069 | $30,404,925 | 43,720 | $22,711 | $17 | $4,961 | 0.000377% | ||||
| Winter Weather | $58,856,813,032 | $166,311,192 | 280,193 | $29,116 | $68 | $170,688 | under 0.0001% |
Totals since the plan: not available. Connecticut planning regions have no county-level plan in FEMA data; see each town's plan dates in the region.
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 | 280,316 |
| Building value (total, not at risk) | $58,884,661,758 |
| Agriculture value (total, not at risk) | $166,311,192 |
| NRI risk rating (all hazards) | Relatively Moderate |
| Expected annual loss, buildings and agriculture, all hazards | $78,543,703 |
| 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) | $4,918,442 |
| Social vulnerability rating | Relatively 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) | 1 | Severe repetitive loss, FMA definition (44 CFR 77.2) | 6 |
| Repetitive loss, NFIP insurance definition | 102 | Severe repetitive loss, NFIP insurance definition | 6 |
The state NFIP coordinator's list, the source FEMA's Handbook names, often uses the NFIP insurance definition (second row).
Repeat-flood properties: county and state-level rows
Sources: 1, 4
| Scope | RL, FMAproperties | SRL, FMAproperties | RL, NFIPproperties | SRL, NFIPproperties | Any categoryproperties | Mitigatedproperties | Currently insuredproperties |
|---|---|---|---|---|---|---|---|
| County total | 1 | 6 | 102 | 6 | 102 | 0 | 40 |
| of which: East Lyme town | 0 | 2 | 22 | 2 | 22 | 0 | 12 |
| of which: Groton town | 0 | 0 | 6 | 0 | 6 | 0 | 3 |
| of which: Montville town | 0 | 0 | 2 | 0 | 2 | 0 | 0 |
| of which: New London city | 1 | 2 | 17 | 2 | 17 | 0 | 6 |
| of which: North Stonington town | 0 | 0 | 2 | 0 | 2 | 0 | 0 |
| of which: Norwich city | 0 | 1 | 16 | 1 | 16 | 0 | 1 |
| of which: Stonington town | 0 | 1 | 16 | 1 | 16 | 0 | 6 |
| of which: Waterford town | 0 | 0 | 10 | 0 | 10 | 0 | 6 |
| of which: Groton city | 0 | 0 | 4 | 0 | 4 | 0 | 3 |
| of which: Franklin town | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| of which: Ledyard town | 0 | 0 | 3 | 0 | 3 | 0 | 1 |
| of which: Stonington borough | 0 | 0 | 3 | 0 | 3 | 0 | 2 |
| Statewide, no county in FEMA's file | 0 | 0 | 9 | 0 | 9 | 0 | 4 |
The statewide row counts properties FEMA's file gives with no county in this state; they are listed for reference and are not in this county's counts.
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 |
|---|---|---|---|---|---|---|---|---|
| Groton city | 090126 | 0 | 0 | 4 | 0 | 4 | 0 | 3 |
| Jewett City borough | 090098 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| New London city | 090100 | 1 | 2 | 17 | 2 | 17 | 0 | 6 |
| Norwich city | 090102 | 0 | 1 | 16 | 1 | 16 | 0 | 1 |
| Stonington borough | 090193 | 0 | 0 | 3 | 0 | 3 | 0 | 2 |
| Bozrah town | 090094 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Colchester town | 090095 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| East Lyme town | 090096 | 0 | 2 | 22 | 2 | 22 | 0 | 12 |
| Franklin town | 090154 | 0 | 0 | 1 | 0 | 1 | 0 | 0 |
| Griswold town | 090173 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Groton town | 090097 | 0 | 0 | 6 | 0 | 6 | 0 | 3 |
| Lebanon town | 090155 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Ledyard town | 090157 | 0 | 0 | 3 | 0 | 3 | 0 | 1 |
| Lisbon town | 090172 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Montville town | 090099 | 0 | 0 | 2 | 0 | 2 | 0 | 0 |
| North Stonington town | 090101 | 0 | 0 | 2 | 0 | 2 | 0 | 0 |
| Preston town | 090139 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Salem town | 090156 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Sprague town | 090105 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Stonington town | 090106 | 0 | 1 | 16 | 1 | 16 | 0 | 6 |
| Waterford town | 090107 | 0 | 0 | 10 | 0 | 10 | 0 | 6 |
| Windham town | 090119 | 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 | 1 | 3 | 81 | 3 | 81 | 0 | 37 |
| 2 to 4 unit residential | 0 | 0 | 4 | 0 | 4 | 0 | 2 |
| other residential | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| non-residential | 0 | 3 | 17 | 3 | 17 | 0 | 1 |
| 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 101 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). Southeastern Connecticut Planning Region, CT: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-30; Planning region FIPS 09180). Automated baseline. https://hazardplain.org/ct/09180/ 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