Hurricane Dorian hovered over the Bahamas, pummelling the islands with a fearsome Category 5 assault that shredded roofs, hurled cars and forced even rescue crews to take shelter until the onslaught passes.

The storm’s top sustained winds fell slightly to 165mph, and its westward movement slowed almost to a standstill.

The system crawled along Grand Bahama Island at just 1mph.

“We need you to bunker down,” Kwasi Thompson, minister of state for Grand Bahama, warned people.

“It’s going to be another 10-12 hours that we’re going to be bombarded with this.”

Thompson and other officials said they were getting distress calls about rising floodwaters but said rescuers could not go out in the violent weather.

“They are ready to get into those areas as soon as the weather subsides,” he said.

Bahamas Tropical Weather
Strong winds move the palms of the palm trees at the first moment of the arrival of Hurricane Dorian in Freeport, Grand Bahama, Bahamas (Ramon Espinosa/AP)

On Sunday, Dorian churned over Abaco Island with battering winds and surf and unleashed heavy flooding as people called radio stations and sent desperate messages on social media to find loved ones.

“We received catastrophic damage here in Abaco,” Parliament member Darren Henfield told reporters.

He said officials did not have information yet on what happened in nearby cays, adding: “We are in search and recovery mode. … Continue to pray for us.”

Information began emerging from other affected islands, with Bahamas Power and Light spokesman Quincy Parker telling ZNS radio station that there was a total blackout in New Providence, the archipelago’s most populous island.

He also said the company’s office in Abaco island was flattened by the storm.

“The reports out of Abaco as everyone knows,” Mr Parker said as he paused for a deep sigh, “were not good”.

Meanwhile, Don Cornish, island administrator for Grand Bahama Island, said officials received many calls from people in distress about flooded homes.

Most people went to shelters as the storm neared.

Tourist hotels shut down, and residents boarded up their homes.

But many people were expected to be left homeless.

“It’s devastating,” Joy Jibrilu, director general of the Bahamas’ Ministry of Tourism and Aviation, said.

“There has been huge damage to property and infrastructure. Luckily, no loss of life reported.”

Tropical Weather
Hurricane Dorian, right, churning over the Atlantic Ocean (AP)

On Sunday, Dorian’s maximum sustained winds reached 185mph, with gusts up to 220mph, tying the record for the most powerful Atlantic hurricane to ever make landfall.

That equalled the Labour Day hurricane of 1935, before storms were named.

The only recorded storm that was more powerful was Hurricane Allen in 1980, with 190mph winds, though it did not make landfall at that strength.

Forecasters said Dorian was likely to begin pulling away from the Bahamas early Tuesday and curving to the northeast parallel to the US Southeast seaboard.

The potent storm was expected to stay close to shore and hammer the coast.

Tropical Weather
A baby sleeps inside a church that was opened up as a shelter for residents who will wait out Hurricane Dorian (Ramon Espinosa/AP)

Authorities cautioned that it could still make landfall on the East Coast.

An advisory from the US National Hurricane Centre in Miami warned that Florida’s east-central coast could see a brief tornado sometime Monday afternoon or evening.

South Carolina governor Henry McMaster issued an order on Sunday for the mandatory evacuation of his state’s entire coast.

The order, which covers about 830,000 people, was to take effect at noon Monday, at which point state troopers were to make all lanes on major coastal highways one-way heading inland.

“We can’t make everybody happy, but we believe we can keep everyone alive,” Mr McMaster said.

A few hours later, Georgia’s governor, Brian Kemp, ordered mandatory evacuations for that state’s Atlantic coast, also starting at midday on Monday.

Authorities in Florida ordered mandatory evacuations in some vulnerable coastal areas.

North Carolina governor Roy Cooper warned his state that it could see heavy rain, winds and floods later in the week.

Dorian first came ashore Sunday at Elbow Cay in Abaco Island, then made a second landfall near Marsh Harbour.

A storm surge was reported at 18 to 23 feet.

In some parts of Abaco, “you cannot tell the difference as to the beginning of the street versus where the ocean begins”, Bahamas prime minister Hubert Minnis said.

According to the Nassau Guardian, he called it “probably the most sad and worst day of my life to address the Bahamian people”.

The Bahamas archipelago is no stranger to hurricanes.

Homes are required to have metal reinforcements for roof beams to withstand winds into the upper limits of a Category 4 hurricane, and compliance is generally tight for those who can afford it.

Risks are higher in poorer neighbourhoods, with wooden homes in low-lying areas.

US Dorian
(PA Graphics)

On Tuesday and Wednesday, Dorian is forecast to be 40 to 50 miles off Florida, with hurricane-force wind speeds extending about 35 miles to the west.

The hurricane centre issued a hurricane watch for Florida’s East Coast from Deerfield Beach north to the Georgia state line.

The same area was put under a storm surge watch.

Lake Okeechobee was under a tropical storm watch.

Mandatory evacuation orders for low-lying and flood-prone areas and mobile homes were in effect from Palm Beach County north to at least the Daytona Beach area, and some counties to the north issued voluntary evacuation notices.

Weekend traffic was light in Florida despite those orders, unlike during the chaotic run-up to Hurricane Irma in 2017, when the unusually broad storm menaced the entire state.

Ken Graham, director of the hurricane centre, urged people not to bet on safety just because the forecast track had the storm a bit offshore.

With every new forecast, “we keep nudging (Dorian’s track) a little bit to the left” — that is, is closer to the Florida coast, Mr Graham said.