Extremely heavy rainfall associated with the remnants of Hurricane Ida overspread southern Connecticut during the evening of September 1 and continued through the early morning hours of September 2. Rainfall totals ranged from 5-8+ inches across much of the region, with much of that rain falling in just a few hours. This resulted in not only widespread flash flooding but also extensive river flooding. The ASOS at Bridgeport Airport recorded 5.59 inches of rain. A CoCoRaHS observer near Stamford recorded 8.10 inches of rain, while another in Uncasville reported 8.58 inches. Broadcast media reported 8.37 and 8.90 inches in Clinton and near Madison, respectively.

Flash Flood in NEW HAVEN, CONNECTICUT
From 01-SEP-21 23:30:00 to 02-SEP-21 01:30:00 (EST-5)
Location: HIGHWOOD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

The entire ground floor of an apartment building in New Haven was flooded.

Flash Flood in FAIRFIELD, CONNECTICUT
From 01-SEP-21 22:30:00 to 01-SEP-21 23:00:00 (EST-5)
Location: SOUTH PORT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Fairfield Police reported numerous flooded streets and road closures across town.

Flood in NEW HAVEN, CONNECTICUT
From 02-SEP-21 00:15:00 to 02-SEP-21 14:30:00 (EST-5)
Location: BEACON FALLS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Naugatuck River at Beacon Falls rose above its minor flood stage of 12.0 feet at 1:15am EDT, crested at a height of 12.79 feet at 2:00am EDT, and fell back below flood stage at 5:30am EDT. This is the 6th highest crest on record for the Naugatuck River at this location.

Flash Flood in FAIRFIELD, CONNECTICUT
From 01-SEP-21 21:45:00 to 01-SEP-21 23:00:00 (EST-5)
Location: STAMFORD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

The intersection of Cove Road and Seaside Avenue in Darien was closed due to flooding.

Flash Flood in FAIRFIELD, CONNECTICUT
From 01-SEP-21 22:00:00 to 01-SEP-21 23:00:00 (EST-5)
Location: PALMERS HILL
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Multiple cars were stranded in flood waters in Stamford with water rescues ongoing.

Flash Flood in FAIRFIELD, CONNECTICUT
From 01-SEP-21 22:30:00 to 01-SEP-21 23:00:00 (EST-5)
Location: BLACK ROCK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Multiple cars were stranded in flood waters on I-95 near Bridgeport with water above the car doors.

Flash Flood in NEW HAVEN, CONNECTICUT
From 01-SEP-21 23:07:00 to 02-SEP-21 01:30:00 (EST-5)
Location: ALLINGTON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

The West Haven Police closed Campbell Avenue in West Haven due to flooding.

Flood in NEW LONDON, CONNECTICUT
From 02-SEP-21 03:15:00 to 02-SEP-21 18:30:00 (EST-5)
Location: GIBBS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Yantic River at Yantic rose above its minor flood stage of 9.0 feet at 4:15am EDT. It then continued rising, climbing above moderate flood stage (9.5 feet) at 5:00am EDT, then above major flood stage (11.0 feet) at 6:30am EDT. The river crested at a height of 11.71 feet at 8:15am EDT. The river fell back below major flood stage at 11:00am EDT, below moderate flood stage at 4:15pm EDT, and finally below minor flood stage at 7:30pm EDT. The crest of 11.71 feet was the seventh highest on record for the Yantic River in this location.

Flash Flood in MIDDLESEX, CONNECTICUT
From 02-SEP-21 02:45:00 to 02-SEP-21 04:00:00 (EST-5)
Location: WESTFIELD
Flood cause: Heavy Rain
Property damage: 50.27K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rain and flash flooding resulted in uninsured damages of $50,266 across Middlesex County.

Flash Flood in NEW LONDON, CONNECTICUT
From 02-SEP-21 03:30:00 to 02-SEP-21 04:23:00 (EST-5)
Location: WEQUETEQUOCK
Flood cause: Heavy Rain
Property damage: 706.24K
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rain and flash flooding resulted in uninsured damages of $706,239 across New London County.

Flash Flood in NEW HAVEN, CONNECTICUT
From 02-SEP-21 02:15:00 to 02-SEP-21 02:45:00 (EST-5)
Location: WALLINGFORD
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: River/Stream Gage

The Quinnipiac River at Wallingford rose above its minor flood stage of 10.0 feet at 3:15am EDT September 2nd. The river ultimately crested at a height of 11.25 feet at 6:15am EDT and 7:45am EDT before falling back below flood stage by 9:00am EDT.

Flash Flood in NEW LONDON, CONNECTICUT
From 02-SEP-21 04:00:00 to 02-SEP-21 04:23:00 (EST-5)
Location: NORWICH
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Power had to be turned off to numerous homes throughout Norwich for safety due to flooded basements. In addition, the Comfort Inn and Suites on Otrobando Avenue had to be evacuated due to more than 5 feet of water in the basement of the hotel. Three apartments in Mohegan Commons on East Baltic Street were flooded and uninhabitable.

Flash Flood in NEW HAVEN, CONNECTICUT
From 01-SEP-21 23:40:00 to 02-SEP-21 01:30:00 (EST-5)
Location: NEW HAVEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Significant flooding was reported into the first floors of multiple dorms at Yale University in New Haven.

Flash Flood in NEW HAVEN, CONNECTICUT
From 02-SEP-21 01:08:00 to 02-SEP-21 01:30:00 (EST-5)
Location: HONEYPOT GLEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Several streets were impassible in Meriden due to significant flash flooding.

Flash Flood in NEW HAVEN, CONNECTICUT
From 02-SEP-21 02:50:00 to 02-SEP-21 04:23:00 (EST-5)
Location: MERIDEN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

A car was partially submerged in flood waters on Mill Street near State Street in Meriden. Mill Street was closed due to heavy flooding.

Flash Flood in NEW LONDON, CONNECTICUT
From 02-SEP-21 03:30:00 to 02-SEP-21 04:23:00 (EST-5)
Location: HARRISONS
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Several roads were closed due to flooding in Waterford including Route 85 at the I-95 overpass, Gardiners Wood Road, and Old Colchester Road at I-395.

Flash Flood in FAIRFIELD, CONNECTICUT
From 01-SEP-21 22:10:00 to 01-SEP-21 23:00:00 (EST-5)
Location: NORTH GREENWICH
Flood cause: Heavy Rain
Property damage: 5.11M
Crop damage: 0.00K
Reported by: Emergency Manager

Heavy rain and flash flooding resulted in uninsured damages of $5,112,636 across Fairfield County.