New Englanders bracing for their first hurricane in 30 years began hauling boats out of the water and taking other precautions Friday as Tropical Storm Henri barreled toward the Northeast coast.

Henri was expected to intensify into a hurricane by Saturday, the U.S. National Hurricane Center said. Impacts could be felt in New England states by Sunday, including on Cape Cod, which is teeming with tens of thousands of summer tourists.

READ: Dominica Completes $2m Bypass Project to Safeguard Community During Hurricane Season

Henri’s track was imprecise, but as of 5 p.m. EDT Friday, the National Weather Service suggested it might make landfall first in eastern Long Island before careening further north. The White House said President Joe Biden was briefed on the storm’s track.

Massachusetts Gov. Charlie Baker on Friday urged people vacationing on the Cape to leave well before Henri hits, and those who planned to start vacations there to delay their plans. “We don’t want people to be stuck in traffic on the Cape Cod bridges when the storm is in full force on Sunday,” he said.

Baker said up to 1,000 National Guard troops were on standby to help with evacuations if needed.

“This storm is extremely worrisome,” said Michael Finkelstein, police chief and emergency management director in East Lyme, Connecticut. “We haven’t been down this road in quite a while and there’s no doubt that we and the rest of New England would have some real difficulties with a direct hit from a hurricane.”

Finkelstein said he’s most concerned about low-lying areas of town that could become impossible to access because of flooding and a storm surge.

Thursday marked exactly 30 years since Hurricane Bob came ashore in Rhode Island as a Category 2 storm, killing at least 17 people and leaving behind more than $1.5 billion worth of damage. Bob, which left streets in coastal towns littered with boats blown free of their moorings, knocked out power and water to hundreds of thousands for days.

Large swaths of the Eastern seaboard were mopping up on Friday from the effects of Henri’s predecessor, Tropical Depression Fred. In North Carolina, Haywood County Sheriff Greg Christopher said four people died and five individuals remained unaccounted for, down from around 20 people reported missing on Thursday.

The weather service warned of the potential for damaging winds and widespread coastal flooding from Henri, and officials in Massachusetts, Connecticut and New York cautioned that people could lose power for a week or even longer. Authorities urged people to secure their boats, fuel up their vehicles and stock up on canned goods.

The system was centered in the Atlantic Ocean late Friday about 230 miles (370 kilometers) south-southeast of Cape Hatteras, North Carolina, and about 615 miles (990 kilometers) south of Montauk Point, New York. It had maximum sustained winds of 70 mph (110 kph).

READ: Officials: Storm lashing Florida strengthens into hurricane

A hurricane warning stretched across the South Shore of Long Island from Fire Island Inlet to Montauk, and the North Shore from Port Jefferson Harbor to Montauk.

The main threats were expected to be storm surge, wind and rain, forecasters said. Storm surge between 3 and 5 feet (1 to 1.5 meters) was possible from Flushing, New York, to Chatham, Massachusetts; and parts of the North Shore and South Shore of Long Island.

Rainfall between 3 to 6 inches (7.5 to 15 centimeters) was expected Sunday through Monday over the region.

Henri was heading north Friday night, and forecasters expected it to approach the coastlines of New York’s Long Island or southern New England by Sunday. New York hasn’t had a direct hit from a major hurricane season storm since Superstorm Sandy wreaked havoc in 2012.

At Safe Harbor Marina in coastal Plymouth, Massachusetts, Steve Berlo was among the many boaters having their vessels pulled out of the water ahead of the storm.

“It’s rare, but when it happens, you want to be sure you’re ready,” said Berlo, 54. “Got to protect our second home. So that’s that. Now I can sleep tonight.”

In the Hamptons, the celebrity playground on Long Island’s east end, officials warned of dangerous rip currents and flooding that’s likely to turn streets, like mansion-lined Dune Road on the Atlantic coast, into lagoons.

Ryan Murphy, the emergency management administrator for the Town of Southampton, said that while the storm’s track continues to evolve, “we have to plan as if it’s going to be like a Category 1 hurricane that would be hitting us.”

The National Weather Service also warned residents and beachgoers on the North Carolina coast of rip currents and rough surf associated with Henri. Meteorologist Steven Pfaff of the weather service’s Wilmington office said swells from Henri were expected to create hazardous surf conditions beginning Friday and continuing on Saturday.

At the U.S. Navy’s submarine base in Groton, Connecticut, personnel on Friday were securing submarine moorings, installing flood gates in front of doors on some waterfront buildings, and doubling up lines on small boats, officials said. Families were being encouraged to watch the forecast and make any necessary preparations.

The Coast Guard urged boaters to stay off the water, saying in a statement: “The Coast Guard’s search and rescue capabilities degrade as storm conditions strengthen. This means help could be delayed.”

At the Port Niantic marina in Niantic, Connecticut, Debbie Shelburn and her employees were already busy Friday hauling boats out of the water and into a large storage building.

“Basically, it’s become all hands on deck. No matter your position — mechanic, whatever — everybody is out there helping with the logistics of moving the boats and getting them secure on land,” she said.