There were almost 50 reports of hail in states including Ohio, Pennsylvania, New York and CT, it said.
A man was sitting in his truck when a tree fell on it, Danbury Mayor Mark Boughton told FOX61.
Connecticut State Police also confirmed that someone in New Fairfield was killed after a tree landed on their auto.
An 11-year-old girl was killed in Newburgh, New York, by a falling tree, while her mother suffered minor injuries.
Much of the ferocity of the storms had dissipated by 10.30pm on Tuesday (Eastern Time) but flash flood warnings were still in effect for eastern Maryland, Delaware and southern New Jersey, where rain continued to be heavy, said Frank Pereira, a meteorologist with the NWS.
Rescuers had to take a boat to get to the victim, Boughton said.
The Brookfield Police Department said on its Facebook page that First Selectman Steve Dunn had "declared a town disaster". Several lightning strikes led to structure fires in New Jersey and MA.
Airlines also canceled and delayed flights in and out of the region.
Severe weather event continues across the Northeast US. Roads in many towns were impassible and some schools canceled classes on Wednesday due to the damage.
At Grand Central Station in New York, Hudson, Harlem and New Haven Line service was suspended due to the storms, the station's Twitter feed said.
New Jersey Gov. Phil Murphy was ready to make use of state assets as he monitored the storm, the outlet reported.
Earlier in the day, upstate NY pounded by thunderstorms and baseball-size hail. Moisture from the Gulf of Mexico will fuel downpours that result in rainfall totals of 1 to 3 inches across other parts of the Southeast and eventually into the Northeast.
New Delhi woke up to strong winds accompanied by dust Wednesday, May 16, and the weather is likely to remain the same for a while. Subsequently on May 9, several parts of Uttar Pradesh were struck by a severe storm that left 18 dead and 27 others injured.
Everbody wanted to see what Sonam Kapoor would wear on her mehendi/wedding/reception and also who all would attend the party. On her first day, Sonam also had Pakistani beauty and Raees actor Mahira Khan accompanying her on the red carpet.
Pre-orders sold out in advance of the launch and those hoping to buy one in-store were met with long lines and empty shelves . The Nintendo retro console, along with the SNES Classic Edition, will be available until the end of 2018.
He said that while the 21-year-old man was born in Chechnya, he had spent nearly his entire life in France. The friend, arrested in the eastern French city of Strasbourg, was born in 1997, a source said.
Allardyce lifted Everton from position 13 to 8 after signing Theo Walcott, Cenk Tosun Wayne Rooney in January. Sam Allardyce has been sacked by Everton hours after he slammed Everton over backroom restructure.
Increasingly common are Ramadan tents in five-star hotels that offer lavish and pricey meals from sunset to sunrise. Ramadan is a 30 day period of fasting recognizing the completion of the holy book by the Prophet Muhammad.
With Ramadan starting on Tuesday, May 15, 2018, the 30-day period will come to an end on Thursday, June 14, 2018. Thursday will be the first day of Ramadan in all other Gulf states as well as in many Arab and Muslim countries.
At the time of the launch, the company has confirmed that these smartphones will receive Android update for the next two years. Powering the mid-range smartphone is a Snapdragon 636 chipset, which is the same chipset found inside the Redmi Note 5 Pro.
Premier League transfer window to open next week
It was over eight months ago that the Premier League voted to make changes to the Summer Transfer Window. This year's summer transfer window opens Thursday, May 17 , which is in a couple of days time.
Zombieland screenwriters hoping to release sequel in 2019
Tyler Ross played Columbus, Kirk Ward played Tallahassee, Maiara Walsh played Wichita and Izabela Vidovic played Little Rock. The writer added that the hope is to start filming sometime early next year, with an October 2019 release date in mind.
Volvo S60 won't offer a diesel engine
Instead, they will be available as either a mild petrol hybrid, plug-in petrol hybrid or battery electric vehicle. Samuelsson told the FT: "We're not saying diesel is more dirty, but it's more complicated and more expensive".
Physically active workers risk an early death
He says that it's all down to the type of exercise you do in your spare time, versus occupational physical activity. The studies they added considered majorly the lifestyle aspects of smoking and alcohol consumption, etc.
N.Korea hints at joining non-nuclear treaties
Japan and the United States have urged North Korea to take specific actions under worldwide non-nuclear treaties. Han did not explicitly mention the Comprehensive nuclear Test-Ban Treaty aimed at introducing that total ban.
June's petrol price could rocket past R15 a litre
The Congress leader P Chidambaram tweeted on Monday that the recent "interval" has coincided with Karnataka elections. This means that the country started the month of May with a fuel price deficit.