Much of the state remains under a flash flood watch after rain inundated eastern Connecticut on Thursday evening, flooding streets and properties.

Flash flood watches are in effect for New London, Middlesex, New Haven, Windham, Tolland and Hartford counties through 6 a.m. Friday.

Doppler radar indicated over 4 inches of rain fell in parts of Waterford and New London, according to First Alert meteorologist Ryan Hanrahan. An NBC Connecticut weather spotter reported 4.21" of rain in the Quaker Hill section of Waterford.

The heaviest rainfall affected eastern Connecticut this evening, parts of Interstate 95 south flooded in Waterford. Waterford police said flooding was reported near the Waterford Crystal Mall on Route 85, which was closed by Interstate 95, and along Route 32.

Part of Mullen Hill Road is closed after part of the pavement collapsed.

Flooding has also been reported on Broad Street in New London, on Main Street at Pennsylvania Avenue in East Lyme and in parts of Groton.

"We had numerous people trapped in the cars behind me, including people in taxis," explained New London Fire Lt. Mark Waters. "We had a couple babies, also, who were trapped."

The threat of heavy rainfall continues through tonight across Connecticut.

The state has needed the rain. Before today's rainfall, Windsor Locks had a 5.8-inch deficit this year, while Bridgeport had a 6.3-inch rainfall deficit for 2015. Those numbers equate to roughly a month and a half worth’s of rain.

While there can be a lingering shower Friday morning, Friday will turn out to be a refreshing day. Partial clearing is expected in the afternoon and temperatures will be in the mid-70s to near 80-degrees.

Skies cloud up on Saturday, and while there can be a shower in the evening, most of the rainfall from the next weather-maker holds off until Sunday. Cloudy skies with periods of rain will be the story on Sunday.

Stay with the NBC Connecticut First Alert weather team for the very latest forecast on-air, online and on the app.