As the storm heads west, hurricane warnings are in effect for the Virgin Islands, Puerto Rico, the Dominican Republic, the Turks and Caicos, Haiti and southeastern Bahamas. A hurricane watch covers Cuba and the central Bahamas. A couple arrive at a store to purchase supplies in Carolina, Puerto Rico. Credit:AP French President Emmanuel Macron said on Wednesday that there would be casualties in two of its Caribbean territories, Saint Martin and Saint Barthelemy, after Irma hammered the islands. "At this moment, it is too early to have a total figure, but I can already say that the impact will be hard and cruel," Mr Macron said after a crisis meeting to assess the situation. "There will be casualties and the material damage on both islands will be considerable."

Most people who were on Antigua and Barbuda were without power and about 1000 people were spending the night in shelters in Antigua, according to Garfield Burford, the director of news at ABS TV and Radio on the island of Antigua, south of Barbuda. A shelf normally containing packaged water is empty at a Piggly Wiggly store in Panama, Florida, on Tuesday. Credit:AP "We are hunkered down and it is very windy ... the wind is a major threat," he said. "So far, some roofs have been blown off." "It's very scary ... most of the islands are dark so it's a very, very frightening," he said.

Motorists head north on US Route 1, Florida, as Hurricane Irma moves its path in the north-east Caribbean. Credit:AP Irma is expected to become the second powerful storm to thrash the US mainland in as many weeks but its precise trajectory remained uncertain. Hurricane Harvey killed more than 60 people and caused damaged estimated as high as $US180 billion ($2.26 billion) when it hit Texas late last month. Karel van Oosterom, the Netherlands ambassador to the United Nations, said Irma hit the Dutch islands of Saba and Sint Eustasius before overrunning St. Martin. Hurricane Irma grew into a dangerous Category 5 storm, the most powerful seen in the Atlantic in over a decade. Credit:NOAA/AP "First information indicates that a lot of damage has been done, but communication is still extremely difficult," he said at a UN meeting.

The eye of the hurricane went over Barbuda, which has a population of about 1600 people, according to ABS radio. "All hearts and all prayers and all minds go out to the Barbudans at this time because they experienced the full brunt," a radio host said on the station early on Wednesday. Public relations professional Alex Woolfall said on Twitter he was hiding underneath a concrete stairwell as the storm neared St. Maarten. "Still thunderous sonic boom noises outside and boiling in stairwell. Can feel scream of things being hurled against building," he said. "Okay I am now pretty terrified so can every non-believer, atheist & heretic please pray for me." The amount of damage and the number of casualties were not yet known. A 75-year-old man died while preparing for the storm in Puerto Rico's central mountains, police said.

Several other Leeward Islands, including Anguilla, Montserrat, St. Kitts and Nevis, as well as the US and British Virgin Islands, Puerto Rico and the Dominican Republic were under a hurricane warning. "Preparations to protect life and property should be rushed to completion," the Hurricane Centre said, warning that Irma "will bring life-threatening wind, storm surge and rainfall hazards" to those islands. Along the beachfront of Puerto Rico's capital, San Juan, work crews scrambled to cover windows with plywood and corrugated metal shutters along Avenida Ashford, a stretch of restaurants, hotels and six-storey apartments. "I am worried because this is the biggest storm we have seen here," said Jonathan Negron, 41, as he supervised workers boarding up his souvenir shop. The Hurricane Centre said Irma ranked as one of the five most powerful Atlantic hurricanes during the past 80 years and the strongest Atlantic basin storm ever outside the Caribbean Sea and Gulf of Mexico.

Puerto Rico Governor Ricardo Rossello urged the 3.4 million residents of the US territory to seek refuge in one of 460 hurricane shelters in advance of the storm and later ordered police and National Guard troops to begin evacuations of flood-prone areas in the north and east of the island. "This is something without precedent," Rossello told a news conference. US President Donald Trump approved emergency declarations for Florida, Puerto Rico and the US Virgin Islands, mobilising federal disaster relief efforts, the White House said. Authorities in the Florida Keys called for a mandatory evacuation of visitors to start at sunrise on Wednesday, and public schools throughout South Florida were ordered closed, some as early as Wednesday.

Residents of low-lying areas in densely populated Miami-Dade County were urged to move to higher ground by Wednesday as a precaution against coastal storm surges, three days before Irma was expected to make landfall in Florida. Several tiny islands in the resort-heavy eastern Caribbean were the first in harm's way. Hurricane watches were in effect for Guadeloupe, Haiti, the Turks and Caicos Islands and the south-eastern Bahamas. Airlines cancelled flights to the region, and American Airlines added three extra flights to Miami from San Juan, St. Kitts and St. Maarten. Loading

Residents of Texas and Louisiana were still recovering from Harvey, which struck Texas as a category 4 hurricane on August 25. It dumped several feet of rain, destroying thousands of homes and businesses, and displaced more than 1 million people. Reuters, Washington Post