Preview: automated baseline. Built automatically from federal data and not yet checked by hand. Check every figure against your own records before you use it in a plan.
Hazard Plain

Lower Connecticut River Valley Planning Region, CT

Risk-assessment baseline packet. Connecticut planning region 09130. Release 2026-10, data as of 2026-09-28.

Download the packet

PDF: PDF, for printing and reading. Word: Word document, tables ready to paste into a plan. Excel: Excel workbook, one sheet per section, full tables. JSON: Packet data (JSON), for analysts. Full packet as a web page. File manifest (checksums, source versions).

Plan clock

No county-level plan row in FEMA data

Map group: Absent from FEMA plan data.

What changed since your last plan

Connecticut planning regions have no county-level plan in FEMA data; see each member town's plan dates.

Plan status for every jurisdiction in the plan

20 jurisdictions. Each row is that jurisdiction's own plan clock. Notes include other approved plans FEMA lists for the same jurisdiction.

JurisdictionTypeStatusPlanApprovedExpiresDays to expirynegative = days since expiryUpdate underwayNotes
Fenwick boroughBoroughApproved, expires 2031-01-25Town of Old Saybrook and Borough of Fenwick Natural Hazard Mitigation Plan (FEMA plan 110205)2026-01-262031-01-251,580
Middletown cityCityExpired on 2026-09-072021 Lower Connecticut River Valley Hazard Mitigation Plan Update (FEMA plan 107275)2021-09-082026-09-07-21FEMA tracker shows a plan awaiting revisions
Chester townTownExpired on 2026-09-072021 Lower Connecticut River Valley Hazard Mitigation Plan Update (FEMA plan 107275)2021-09-082026-09-07-21FEMA tracker shows a plan awaiting revisions
Clinton townTownExpired on 2026-09-072021 Lower Connecticut River Valley Hazard Mitigation Plan Update (FEMA plan 107275)2021-09-082026-09-07-21FEMA tracker shows a plan awaiting revisions
Cromwell townTownExpired on 2026-09-072021 Lower Connecticut River Valley Hazard Mitigation Plan Update (FEMA plan 107275)2021-09-082026-09-07-21FEMA tracker shows a plan awaiting revisions
Deep River townTownExpired on 2026-09-072021 Lower Connecticut River Valley Hazard Mitigation Plan Update (FEMA plan 107275)2021-09-082026-09-07-21FEMA tracker shows a plan awaiting revisions
Durham townTownExpired on 2026-09-072021 Lower Connecticut River Valley Hazard Mitigation Plan Update (FEMA plan 107275)2021-09-082026-09-07-21FEMA tracker shows a plan awaiting revisions
East Haddam townTownExpired on 2026-09-072021 Lower Connecticut River Valley Hazard Mitigation Plan Update (FEMA plan 107275)2021-09-082026-09-07-21FEMA tracker shows a plan awaiting revisions
East Hampton townTownExpired on 2026-09-072021 Lower Connecticut River Valley Hazard Mitigation Plan Update (FEMA plan 107275)2021-09-082026-09-07-21FEMA tracker shows a plan awaiting revisions
Essex townTownExpired on 2026-09-072021 Lower Connecticut River Valley Hazard Mitigation Plan Update (FEMA plan 107275)2021-09-082026-09-07-21FEMA tracker shows a plan awaiting revisions
Haddam townTownExpired on 2026-09-072021 Lower Connecticut River Valley Hazard Mitigation Plan Update (FEMA plan 107275)2021-09-082026-09-07-21FEMA tracker shows a plan awaiting revisions
Killingworth townTownExpired on 2026-09-072021 Lower Connecticut River Valley Hazard Mitigation Plan Update (FEMA plan 107275)2021-09-082026-09-07-21FEMA tracker shows a plan awaiting revisions
Lyme townTownExpired on 2026-09-072021 Lower Connecticut River Valley Hazard Mitigation Plan Update (FEMA plan 107275)2021-09-082026-09-07-21FEMA tracker shows a plan awaiting revisions
Middlefield townTownExpired on 2026-09-072021 Lower Connecticut River Valley Hazard Mitigation Plan Update (FEMA plan 107275)2021-09-082026-09-07-21FEMA tracker shows a plan awaiting revisions
Old Lyme townTownExpired on 2026-09-072021 Lower Connecticut River Valley Hazard Mitigation Plan Update (FEMA plan 107275)2021-09-082026-09-07-21FEMA tracker shows a plan awaiting revisions
Old Saybrook townTownApproved, expires 2031-01-25Town of Old Saybrook and Borough of Fenwick Natural Hazard Mitigation Plan (FEMA plan 110205)2026-01-262031-01-251,580
Portland townTownExpired on 2026-09-072021 Lower Connecticut River Valley Hazard Mitigation Plan Update (FEMA plan 107275)2021-09-082026-09-07-21FEMA tracker shows a plan awaiting revisions
Westbrook townTownExpired on 2025-08-11Town of Westbrook Natural Hazard Mitigation Plan Update (FEMA plan 106332)2020-08-122025-08-11-413FEMA tracker shows a plan awaiting revisions
Southeastern Connecticut Council of GovernmentsOtherApproved, expires 2028-09-26Southeastern Connecticut Council of Governments Multi-Jurisdictional Hazard Mitigation Plan Update (FEMA plan 109036)2023-09-272028-09-26729member approved 2025-06-11
Three Rivers CommunityCollege/UniversityExpired on 2022-06-01Connecticut State Colleges and Universities (FEMA plan 102570)2017-06-022022-06-01-1,580

State plan status and tribal plans in this state: see the state page.

What the packet contains

Sections in FEMA checklist order. Each heading names the review item its tables support; whether the item is satisfied is decided by the plan and its reviewers. Full tables are in the downloads above.

Supports B1-a Hazards

16 of the 18 National Risk Index hazards apply here; omission evidence is shown only where NRI rates a hazard "Not Applicable", no federal declaration names it and Storm Events has no record of it since 1996.

Highest expected annual loss (NRI, modeled): Inland Flooding, Hurricane and Coastal Flooding.

Also check locally (not covered by NRI): 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 and expansive soils.

Check your state hazard mitigation plan's hazard list for this county; explain any hazard you drop.

Supports B1-b Location

  • Avalanche, Earthquake, Hurricane, Landslide, Tornado, Tsunami, Volcanic Activity and Wildfire: Census tract rating counts from the National Risk Index tract table (see B1-f). Tract maps and place names are not in this packet.
  • 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.
  • Cold Wave, Drought, Hail, Heat Wave, Ice Storm, Lightning, Strong Wind and Winter Weather: Affects the whole planning area; national data do not distinguish locations within the county. Confirm locally.

Supports B1-c Extent

Storm Events records for 13 of 20 hazard groups, with the scale, observed range and worst recorded event for each; the others say local data required.

  • Hail: 2.75 in hail, 1995-06-20; same size also recorded on 1969-05-29
  • Thunderstorm Wind: 96 kt (110 mph) estimated gust, Thunderstorm Wind, 2010-07-21
  • Tornado: F3 tornado, 1951-08-21, 33 yd wide, $250,000 property; crops not recorded (1951 dollars), 8 direct injuries

Supports B1-d Previous occurrences

58 federal declaration rows for this area (24 counted incidents), each with type, dates and county Public Assistance dollars.

Connecticut planning regions have no county-level plan in FEMA data; see each member town's plan dates.

2 statewide declarations listed separately.

Hazards with no recorded events are stated as such (5 of 18).

Storm Events history: 803 records (notable ones in the PDF, all of them in the Excel file).

Supports B1-e Probability

FEMA annualized frequency (modeled) for each hazard, with a descriptor from a scale defined in the packet.

  • Highly likely: Coastal Flooding, Hail, Lightning, Strong Wind and Winter Weather
  • Likely: Cold Wave, Heat Wave, Hurricane, Ice Storm, Inland Flooding, Landslide and Tornado
  • Possible: Drought

Historical frequency by intensity band (tornado, hail, wind): 9 bands from Storm Events.

Supports B1-f Variation across the planning area

Range of census tract risk scores within the area for 18 hazards (44 tracts; rated tracts only).

18 member jurisdictions: plan clock, repeat-flood count, Public Assistance dollars and event records naming the place (starter, confirm locally).

Supports B2-a, B2-b Assets and impacts

Local data required

County-level starter. The plan must describe impacts for each participant and its own assets.

Connecticut planning regions have no county-level plan in FEMA data; see each member town's plan dates.

Checklist of what to gather locally: Critical facilities and lifelines per hazard; A problem statement per participant per hazard; Changes in development in hazard-prone areas since the last approval, or a statement of none (E1-a); Future assets.

Supports B2-a Context

Population 174,152; building value $40,080,990,112 and agriculture value $77,166,348 (total, not at risk).

National Risk Index rating Relatively Moderate; social vulnerability Very Low; community resilience Very High.

Supports B2-c Repetitive loss

Repetitive-loss properties, FMA definition (44 CFR 77.2): 24 repetitive loss, 30 severe repetitive loss. NFIP insurance definition: 303 and 23.

Mitigated 4; insured 135; NFIP data as of 2026-08-02. Counts by occupancy and for each member community are in the packet.

Releases

Monthly releases are planned (not yet running); files for a release never change. Earlier releases will be listed here with what changed between them. All releases.

Cite this

Hazard Plain (2026). Lower Connecticut River Valley Planning Region, CT: risk-assessment baseline packet, release 2026-10 (data as of 2026-09-28; Connecticut planning region 09130). Preview: automated baseline. https://hazardplain.org/ct/09130/ Built from FEMA OpenFEMA, the FEMA National Risk Index and NOAA NCEI Storm Events; source versions in the packet's Sources list.

Source citations for the plan's bibliography (8)

How this packet is built, its sources and its limits