Hurricane Dorian grazes Puerto Rico

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A couple board up the door of their beachfront house as Tropical Storm Dorian approaches in Yabucoa, Puerto Rico

The eye of Dorian, a category one hurricane, has missed the main island of Puerto Rico.

The US territory’s smaller islands, Vieques and Culetra, are being battered by heavy rain and high winds.

Dorian is considerably less powerful than the hurricanes that hit Puerto Rico two years ago.

It is expected to gather strength in the coming days, and is on course to reach the US states of Florida or Georgia by the weekend.

Florida declared a state of emergency on Wednesday. Governor Ron DeSantis said it was “important for Floridians on the East Coast to monitor this storm closely”.

However, experts say it is too early to say exactly where or when it could arrive.

Dennis Feltgen, a National Hurricane Center meteorologist in Miami, told news agency AP that the “large storm” could land anywhere from South Florida to South Carolina.

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Media captionBBC Weather’s Stav Danaos looks at the track of Hurricane Dorian

What’s the forecast?

The storm is packing winds of more than 75mph (120 km/h) and is expected to bring up to 10in (25cm) of rain in some places.

Wind gusts of 111mph (178 km/h) were reported on Wednesday afternoon close to St Thomas in the US Virgin Islands, just east of Puerto Rico.

Forecasters have warned of life-threatening flash flooding and rip-current conditions as the storm moves across the region.

The storm’s first victim was reportedly an 80-year-old man, who police said died after falling off a ladder as he tried to prepare for the hurricane in San Juan.

Schools in Puerto Rico are closed, while Governor Wanda Vazquez Garced has enacted a law banning the sale of alcohol for at least the next 24 hours, according to CNN. Two cruise liners have adjusted their itineraries to avoid the territory.

Some 23,000 people were said to be without power in Puerto Rico by Wednesday afternoon, with further power cuts reported in the US Virgin Islands, AP said.

According to Mr Feltgen, the storm is projected to reach the US on Sunday or Monday.


A guide to the world’s deadliest storms

Hurricanes are violent storms that can bring devastation to coastal areas, threatening lives, homes and businesses.

Hurricanes develop from thunderstorms, fuelled by warm, moist air as they cross sub-tropical waters.
Warm air rises into the storm.

Air swirls in to fill the low pressure in the storm, sucking air in and upwards, reinforcing the low pressure.

The storm rotates due to the spin of the earth and energy from the warm ocean increases wind speeds as it builds.

When winds reach 119km/h (74mph), it is known as a hurricane – in the Atlantic and Eastern Pacific – or a typhoon in the Western Pacific.

“Everybody has a plan until they get punched in the face. Well, we’re about to get punched in the face.”
Florida Mayor Bob Buckhorn, ahead of Hurricane Irma (2017)

The central eye of calmer weather is surrounded by a wall of rainstorms.
This eyewall has the fastest winds below it and violent currents of air rising through it.

A mound of water piles up below the eye which is unleashed as the storm reaches land.
These storm surges can cause more damage from flooding than the winds.

“Urgent warning about the rapid rise of water on the SW FL coast with the passage of #Irma’s eye. MOVE AWAY FROM THE WATER!”
Tweet from the National Hurricane Center

The size of hurricanes is mainly measured by the Saffir-Simpson scale – other scales are used in Asia Pacific and Australia.

Winds 119-153km/h
Some minor flooding, little structural damage.
Storm surge +1.2m-1.5m

Winds 154-177km/h
Roofs and trees could be damaged.
Storm surge +1.8m-2.4m

Winds 178-208km/h
Houses suffer damage, severe flooding
Storm surge +2.7m-3.7m

Hurricane Sandy (2012) caused $71bn damage in the Caribbean and New York

Winds 209-251km/h
Some roofs destroyed and major structural damage to houses.
Storm surge +4m-5.5m

Hurricane Ike (2008) hit Caribbean islands and Louisiana and was blamed for at least 195 deaths

Winds 252km/h+
Serious damage to buildings, severe flooding further inland.
Storm surge +5.5m

Hurricane Irma (2017) caused devastation in Caribbean islands, leaving thousands homeless

“For everyone thinking they can ride this storm out, I have news for you: that will be one of the biggest mistakes you can make in your life.”
Mayor of New Orleans Ray Nagin ahead of Hurricane Gustav, 2008

What did President Trump say?

Late on Tuesday, President Trump approved an emergency declaration authorising federal agencies to provide disaster relief.

He also lashed out at Puerto Rico as the island hunkered down for Dorian’s approach.

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Hurricane Dorian passing over St Thomas

In a series of tweets on Wednesday, he said the island’s government was “broken” and “corrupt”.

He added that he was “the best thing that’s ever happened to Puerto Rico”.

Carmen Yulin Cruz. mayor of the Puerto Rican capital San Juan, tweeted: “THIS IS NOT ABOUT POLITICS; THIS IS ABOUT SAVING LIVES.”

On Tuesday, Mr Trump tweeted: “Wow! Yet another big storm heading to Puerto Rico. Will it ever end?”

The president has previously faced political censure for his 2017 response to Hurricane Maria, which caused severe devastation in Puerto Rico.

He rated his handling of the disaster as a “tremendous success” while disputing official findings of the high death toll.

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A woman purchases bottled water from a local grocery store as Tropical Storm Dorian approaches in Cabo Rojo, Puerto Rico

Has Puerto Rico recovered from Maria?

Some 30,000 homes in Puerto Rico still do not have proper roofs, merely tarps, according to US media.

The territory remains burdened with more than $70bn in debt – a crisis exacerbated by storms.

Nearly 3,000 of the island’s over three million residents died as a result of Maria – many due to poor healthcare and a lack of electricity and clean water.

More than 1,000 roads remain blocked by that storm’s landslides, the island’s transportation secretary has said.

It took 11 months to restore full power to the island, and recurring electricity cuts caused further deaths from diabetes and sepsis.

The storm was the most intense cyclone worldwide that year and caused an estimated $100bn (£77bn) in damage.

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Media captionWhy Hurricane Maria hit Puerto Rico so hard

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