Fearsome Hurricane Irma cut a path of devastation across the northern Caribbean, leaving at least 10 dead and thousands homeless after destroying buildings and uprooting trees on a track Thursday that could lead to a catastrophic strike on Florida.

The most potent Atlantic Ocean hurricane ever, Irma weakened only slightly on Thursday morning and remained a powerful Category 5 storm with winds of 180mph (285 kph), according to the US National Hurricane Centre.

The storm was increasingly likely to rip into heavily populated South Florida on Sunday, prompting the governor to declare an emergency and officials to impose mandatory evacuation orders for parts of the Miami metro area and the Florida Keys. Forecasters said it could punish the entire Atlantic coast of Florida and rage on into Georgia and South Carolina.

"This could easily be the most costly storm in US history, which is saying a lot considering what just happened two weeks ago," said Brian McNoldy, a hurricane researcher at the University of Miami, alluding to the damage caused by Hurricane Harvey.

French Interior Minister Gerard Collomb told France Info radio that eight had died and 23 injured in the country's Caribbean island territories, and he said the toll on Saint-Martin and Saint-Barthelemy could be higher because rescue teams have yet to finish their inspection of the islands. "The reconnaissance will really start at daybreak," Collomb said.

At a news conference, Collomb also said 100,000 food rations have been sent to the islands, the equivalent of four days of supplies.

"It's a tragedy, we'll need to rebuild both islands," he said. "Most of the schools have been destroyed."

French President Emmanuel Macron's office said he will go to the islands has soon as weather conditions permit.

In the United Kingdom, the government said Irma inflicted "severe and in places critical" damage to the British overseas territory of Anguilla. Foreign Office Minister Alan Duncan said the Caribbean island took the full force of the hurricane. He told lawmakers on Thursday that the British Virgin islands have also suffered "severe damage."

Irma blacked out much of Puerto Rico, raking the U.S. territory with heavy wind and rain while staying just out to sea, and it headed early Thursday toward the Dominican Republic and Haiti.

To the east, authorities struggled to get aid to small Caribbean islands devastated by the storm's record 185mph winds. Communications were difficult with areas hit by Irma, and information on damage trickled out. Nearly every building on Barbuda was damaged when the hurricane's core crossed almost directly over the island early Wednesday and about 60 per cent of its roughly 1,400 residents were left homeless, Antigua and Barbuda Prime Minister Gaston Browne said.

"It is just really a horrendous situation," Browne said after returning to Antigua from a plane trip to the neighboring island. He said roads and telecommunications systems were wrecked and recovery would take months, if not years.

Source: Khaleej Times