Flood watches are in effect from northeastern Pennsylvania to New Hampshire.
Henri continues to churn across the Northeast where heavy rain and flooding are still possible through Monday night.
Flood watches remain in effect from northeastern Pennsylvania to New Hampshire.
The storm made landfall as a tropical storm in Rhode Island early Sunday afternoon, bringing wind gusts up to 70 miles per hour and a storm surge of up to 4 feet to the surrounding regions. Over 9 inches of rain was recorded in Brooklyn, New York. Henri weakened to a tropical depression on Sunday night and will leave the Northeast by Monday night.
More than 53,000 customers across two states were still without power early Monday morning as Henri slowly moved over the New England area.
As of 5 a.m. ET, there were 44,104 customers without power in Rhode Island, where Henri made landfall, while 9,737 were without power in Connecticut, according to data collected by PowerOutage.US.
-ABC News' Will Gretsky.
Henri continued to weaken Sunday night and is now downgraded to a tropical depression, according to the National Hurricane Center.
The storm is now located 10 miles southwest of Hartford, Connecticut and has sustained winds of 35 mph.
The National Hurricane Center warned that the storm will continue to produce heavy rainfall and flooding across portions of southern New England and Northern mid-Atlantic states through Monday.
-ABC News' Hope Osemwenkhae
National Grid said it is deploying over 4,000 personnel in Rhode Island and Massachusetts to restore power to affected areas.
As of 5 p.m. Sunday, approximately 72,600 customers in Rhode Island and 8,500 in Massachusetts were without power, according to the utility.
"The hardest hit communities in Rhode Island include South Kingstown, Narragansett, Westerly, Jamestown, Charlestown and North Kingstown," National Grid said in a news release.
The utility said it estimates to have power restored to all affected customers by mid-week.
Tropical storm warnings for the Northeast states affected by Henri were dropped around 5 p.m Sunday.
However, 40 million Americans across nine states from Delaware to New Hampshire remain under a flash flood watch as the threat for major flash flooding continues through Monday.
Rainfall rates of two inches and hour have been reported in areas experiencing flash flooding, and an additional half a foot of rain is still forecast with highest amounts likely over the Lower Hudson Valley, Northeast New Jersey, New York City, Connecticut and western Massachusetts.
-ABC News' Melissa Griffin
