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Dorian strengthens to major category 3 hurricane

Media captionHurricane Dorian is heading towards Florida – the governor warns of a ‘multi-day event’.

Hurricane Dorian has strengthened to an “extremely dangerous” category three storm, the US National Hurricane Center (NHC) says.

It poses a “significant threat to Florida and the north-western Bahamas”, the NHC warned.

The storm is expected to hit Florida as a 130mph (209km/h) category four.

Forecasters warn it could be the state’s worst storm since category five Hurricane Andrew killed 65 people and destroyed 63,000 homes in 1992.

Dorian is projected to make landfall early next week.

The storm is moving slowly – at just 10mph (17km/h) – as it crawls north-west across the ocean surface.

Hurricanes tend to get stronger as they move over warm water like that off the Florida coast.

What’s the forecast?

The storm is currently packing maximum sustained winds of about 115mph.

“Dorian is anticipated to remain an extremely dangerous major hurricane while it moves near the north-western Bahamas and approaches the Florida peninsula into early next week,” the NHC said.

Media captionHurricane Dorian strengthens as it moves towards Bahamas

The NHC warned in an earlier briefing that Dorian could cause “incredibly catastrophic damage” and life-threatening storm surges.

Hurricane Dorian is also expected to drop up to 12in (30cm) of rain on the coastal US, with some areas getting as much as 18in.

Tides in the region are already at some of their highest levels of the year, owing to a naturally occurring event.

A new moon, combined with the coming the summer equinox, has created what are known in Florida as “king tides”.

Forecasters warn this is likely to exacerbate dangerous levels of flooding.

How are Florida residents preparing?

Florida’s Governor Ron DeSantis has declared a state of emergency for the whole state, as has President Donald Trump.

He told residents: “We urge all Floridians to have seven days’ worth of food, medicine and water.

“This is potentially a multi-day event where it will churn slowly across the state. That obviously creates a whole host of issues.”

The governor has activated 2,500 National Guard troops, with another 1,500 on standby.

Image copyright
Getty Images

Image caption

Workers place hurricane shutters over windows in Florida

Shoppers in Florida have been queuing around the block to snap up supplies such as medication and fuel.

People have been asked to bring their pets with them in case of evacuation, and on social media, the names of hotels that accept pets are being shared.


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

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What is President Trump doing?

President Trump warned Dorian “could be an absolute monster”. He cancelled a planned trip to Poland because of the storm, sending Vice-President Mike Pence instead.

Mr Trump’s critics have argued that he is only taking the hurricane seriously now because it is threatening white people on the US mainland.

A Democratic congressman, Don Beyer of Virginia, told CNN the Republican president was taking notice because “Florida is not an island full of people of colour”.

In a tweet this week, Mr Trump seemed to express frustration that Puerto Rico was facing “yet another big storm”, as he cited the budgetary costs of disaster relief. Dorian ended up just grazing the US territory.

In Canada, former Prime Minister Kim Campbell stirred controversy by tweeting that she hoped for “a direct hit on Mar-a-Lago”, the president’s Palm Beach club house.

She later apologised.

What about the Bahamas?

The NHC has issued a hurricane watch for the north-western Bahamas, warning that heavy rain “may cause life-threatening flash floods”.

Bahamas Prime Minister Hubert Minnis on Friday announced an evacuation order for parts of Grand Bahama and the Abaco Islands, both in the north of the archipelago.

“For those residents of Grand Bahama and Abaco who wish to leave these islands, flights are being increased. I am appealing to residents who are able to do so financially to seek shelter among family members and other suitable accommodations for their safety,” he said in a press conference.

Dr Minnis said he was making the “strongest plea possible” for people expected to be affected to evacuate,

“I urge you, do not be foolish and try to brave out this hurricane. The price you may pay for not evacuating is your life or other serious physical harm.”

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Dorian strengthens to major category 3 hurricane

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