The National Weather Service is also investigating two sightings of tornadoes in Sullivan County and in Newburgh.
One of the tornadoes, an EF1 packing 100mph winds touched down in Southbury and moved along a 4.5-mile path into Oxford.
The powerful storms that swept through New York's lower Hudson Valley spawned three tornadoes.
The NWS completed a storm survey of the damage Wednesday night.
Cuomo said Wednesday that falling trees in Newburgh claimed the lives of an 11-year-old girl in a parked vehicle and a woman who was driving.
The NWS said numerous trees were uprooted along both paths. The third tornado, an EF0 with winds of 85 miles per hour, struck in Newburgh in Orange County.
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Tuesday's round of severe weather came through packing a punch across the tri-state area producing five tornadoes and four downbursts that caused widespread damage to the Hudson Valley and CT.
Gov. Andrew Cuomo said he was declaring a state of emergency in Putnam, Dutchess, Orange and Sullivan counties and said he was "deploying members of the New York National Guard to assist with recovery operations".
Residents in the Northeast cleaned up Wednesday, a day after powerful storms pounded the region with torrential rain and marble-sized hail, leaving at least four people dead and more than 200,000 homes and businesses without power.
Storm clouds gather over New York City on Tuesday.
Meteorologists for the National Weather Service on Wednesday confirmed that a tornado of 110 miles per hour struck Kent and one of 100 miles per hour ripped through Patterson. Roads in many towns were impassible and some schools canceled classes on Wednesday due to the damage.