Fallen trees blocking the roads forced rescuers to use a boat to reach the man, who had died before they could arrive, Fox News reported.
"The flood concern going forward looks to be from Virginia up into Southern New Jersey where rainfall amounts could be 4-8 inches over the coming days with localized amounts exceeding 10 inches", CNN meteorologist Michael Guy said.
One of those people was a man trying to wait out the storm in his truck but was killed by a falling tree, and the other was an 11-year-old girl also killed by a tree crushing the vehicle she was in.
The thunderstorms brought dangerously high winds, hail, lightning and flash flooding to parts of the northeast region early yesterday evening, downing trees and knocking out power-an estimated 100,000 CT residents lost power due to the storm.
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. But there were no reports of damage from the event.
The severe storms have ended, but more rain is expected in the region Wednesday.
In Connecticut, a man was killed when a tree fell on his truck, according to Danbury Mayor Mark Boughton.
Earlier in the day, upstate NY pounded by thunderstorms and baseball-size hail.
More than 157,000 utility customers in NY were without power midday Wednesday.
The storms downed trees and power lines across the region. Utilities reported about 83,600 power outages Wednesday afternoon, down from a high of more than 120,000. An official said it could take days to return the power. Several lightning strikes led to structure fires in New Jersey and MA. But there were no reports of damage from the abnormally high tides reported in areas from Perth Amboy in New Jersey to Delaware's Fenwick Island.
Airlines also cancelled and delayed flights in and out of the region. Thousands of people were also stranded in New York City's Grand Central Station during Tuesday evening's commute after downed trees on the rails caused temporary suspensions. Concourses were packed with passengers waiting for service to resume.