Tropical Storm Henri was downgraded to a tropical depression late Sunday after slamming into Rhode Island on the US east coast, knocking out power to thousands of Americans, uprooting trees, and bringing record rainfall.

Attendees of the "We Love NYC: The Homecoming Concert" were ushered out after the event was canceled due to severe weather warnings in Central Park
Attendees of the "We Love NYC: The Homecoming Concert" were ushered out after the event was canceled due to severe weather warnings in Central Park AFP / Kena Betancur

The storm hit land near the town of Westerly, Rhode Island, at approximately 12:15 PM (1615 GMT), the National Weather Service said. Henri had already been downgraded from a Category 1 Hurricane earlier on Sunday.

But the National Hurricane Center (NHC) said in its 5:00 am (0900 GMT) advisory that Henri was "nearly stationary" and winds had reduced to 30 miles per hour (48 kilometers per hour) -- much lower than predicted gusts of 75 mph -- with "little change in strength" forecast.

Homes were boarded up in Connecticut as Hurricane Henri steams towards the US east coast
Homes were boarded up in Connecticut as Hurricane Henri steams towards the US east coast AFP / JOSEPH PREZIOSO

Henri is a rare tropical storm to strike America's northeastern seaboard and comes as the surface layer of oceans warms due to climate change.

The warming is causing cyclones to become more powerful and carry more water, posing an increasing threat to the world's coastal communities, scientists say.

Members of the Edelweiss construction crew worked fast to protect costal homes by barricading their windows and doors with plywood sheets before Hurricane Henri hits the beach front area in New London, Connecticut
Members of the Edelweiss construction crew worked fast to protect costal homes by barricading their windows and doors with plywood sheets before Hurricane Henri hits the beach front area in New London, Connecticut AFP / JOSEPH PREZIOSO

Millions of residents in New England and New York's Long Island had been told to prepare for violent winds, days without electricity, and storm surges of up to five feet.

Rhode Island Governor Dan McKee said there was "significant flooding" in areas. There were no immediate reports of any casualties.

Members of a private beach association for Guthrie Beach tie down and disassemble beach huts prior to the arrival of Hurricane Henri in New London, Connecticut on August 21, 2021
Members of a private beach association for Guthrie Beach tie down and disassemble beach huts prior to the arrival of Hurricane Henri in New London, Connecticut on August 21, 2021 AFP / JOSEPH PREZIOSO

By mid-afternoon, the NHC had lifted all surge warnings and initial reports from residents indicated the storm was not as bad as projections feared although fallen trees nearly damaged homes in Groton, Connecticut.

"We dodged a bullet," James Kiker, of Newport, Rhode Island, told AFP, saying he saw only "minimal damage" in his area, including a few broken branches.

Members of a private beach association for Guthrie Beach tie down and disassemble beach huts prior to the arrival of Hurricane Henri in New London, Connecticut on August 21, 2021
Members of a private beach association for Guthrie Beach tie down and disassemble beach huts prior to the arrival of Hurricane Henri in New London, Connecticut on August 21, 2021 AFP / JOSEPH PREZIOSO

Residents on Long Island, home to the plush Hamptons villages where wealthy New Yorkers retreat in summer, expressed relief that the storm's path had skirted east of them.

"I will continue to stay alert as still plenty of wind, rain and surging seas await us but I am breathing a little easier," Amy Pedatella, a 46-year-old property manager who spent Saturday securing seaside homes in the Hamptons, told AFP.

Shoppers exit a department store as tropical storm Henri approaches in Westbury, Long Island on August 21, 2021
Shoppers exit a department store as tropical storm Henri approaches in Westbury, Long Island on August 21, 2021 AFP / Ed JONES
A man walks outside a convenience store as Tropical Storm Henri approaches, in Montauk, Long Island on August 22, 2021
A man walks outside a convenience store as Tropical Storm Henri approaches, in Montauk, Long Island on August 22, 2021 AFP / Ed JONES

In Newark, New Jersey, flash flooding caused havoc with emergency services rescuing 86 people, including 16 children, from submerged vehicles.

In Helmetta, 30 miles south, volunteer firefighters waded through waist-deep water to help evacuate residents from waterlines rising dangerously close to their homes.

Some 79,000 people lost power in Rhode Island and another 33,000 suffered blackouts in Connecticut, according to the tracking website poweroutage.us.

More than 200 flights were canceled at Newark airport while New York's LaGuardia and JFK airports canceled almost 200 between them, they said.

President Joe Biden ordered the Federal Emergency Management Agency (FEMA), to coordinate disaster relief efforts in Rhode Island, Connecticut, and New York, where Governor Andrew Cuomo deployed 500 National Guard soldiers.

"We're doing everything we can now to help those states prepare, respond and recover," he told reporters.

Henri missed New York City by several miles but still caused tropical storm conditions overnight and throughout Sunday, where a flash flood warning was in effect until 5:45 pm.

Rain late Saturday forced New York to halt a star-studded Central Park concert billed as a "homecoming" for a metropolis hard hit by the pandemic.

An announcer cut off pop legend Barry Manilow mid-song to urge revelers to proceed swiftly but calmly to the nearest exit.

The National Weather Service said 1.94 inches of rain fell in the park between 10:00 pm and 11:00 pm Saturday, the wettest hour on record in the city of eight million people.

By the time it blows out, Henri is expected to have produced three to six inches of rain (7.5 to 15 centimeters) across the region, with isolated maximum totals near 12 inches, the NHC said.

The warnings also reignited memories of Hurricane Sandy, a more powerful storm that knocked out power for much of Manhattan and flooded subways in 2012.