As the newly upgraded Hurricane Henri closed in on the northeastern United States, preparations for a storm grew more urgent Saturday.

The storm’s latest track put it course to collide Sunday with a long stretch of coastline, with hurricane warnings extending from near the old whaling port of New Bedford, Massachusetts, across the luxurious oceanfront estates of New York’s Hamptons, to the summer getaway of Fire Island.

Intense winds and potentially dangerous tidal surges were expected as far east as Cape Cod and as far west as the New Jersey shore, and utilities warned ensuing power outages could last a week or even more.

Henri was veering a bit further west than originally expected, and if that track holds, it would have eastern Long Island in its bullseye rather than New England, which hasn’t taken a direct hit from a hurricane since the deadly Hurricane Bob in 1991.

New York hasn’t had a direct hit from a powerful cyclone since Superstorm Sandy wreaked havoc in 2012. Some of the most important repairs from that storm have been completed, but many projects designed to protect against future storms remain unfinished.

Residents and visitors on Fire Island, a narrow strip of sandy villages barely above sea level off Long Island’s southern coast, were urged to evacuate. The last boats out will leave at 10:40 pm Saturday; after that, officials said, there may be no way out for people who decide to ride out the storm.

“If they do not leave the island today, they will be stuck on the island and we do not know what kind of conditions they may be facing. But they could be difficult. They could be dangerous,” said Suffolk County Executive Steve Bellone.

Gov. Andrew Cuomo pleaded with New York residents to make last-minute preparations, warning that heavy rain, winds and storm surges from Henri could be as devastating as Superstorm Sandy in some parts of the state.

“We have short notice. We’re talking about tomorrow,” Cuomo said. “So if you have to move, if you have to stock up, if you have to get to higher ground, it has to be today. Please.”

Service on some eastern branches of the Long Island Rail Road, a major commuter rail system, will be suspended at midnight, said Mr Cuomo

The governor, who will leave office in two days following a sexual harassment scandal, warned that heavy rains were expected to create problems far up into the Hudson River Valley.

With a top wind speed of 75 mph (120 kph) Saturday, Henri sped up to move north-northeast at 17 mph (27 kph) as of Saturday afternoon. It’s still about 395 miles (635 kilometres) south of Montauk Point on New York’s Long Island.

Southampton Town Supervisor Jay Schneiderman said the town was considering issuing a voluntary evacuation advisory for about 6,000 people. He said current storm models show that the storm’s center would run “smack on the town of Southampton.” He described a run on supplies like batteries and flashlights as people “are starting to wake up.”