Hurricane Dorian: US braced for 'life-threatening' storm surge – BBC News, BBC News

Hurricane Dorian: US braced for 'life-threatening' storm surge – BBC News, BBC News



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Media captionResidents in the Bahamas say ‘it’s total devastation’

Hurricane Dorian is expected to bring a “life-threatening storm surge” up the US east coast after causing widespread destruction in the Bahamas.

Residents from Florida all the way up to Virginia are warned to listen to emergency advice as the category two hurricane slowly moves north.

The storm has weakened after killing at least 20 people in the Bahamas.

Bahamas PM Hubert Minnis said called it “one of the greatest national crises in our country history”.

On 1 September Dorian hit the country with winds of up to (mph) 298 km / h) – equalling the highest ever recorded at landfall. It battered the Abaco Islands and Grand Bahama, in the north of the archipelago, for two days.

Although the storm weakened after moving north late on Tuesday, it has also grown

What’s the latest on the storm?

Dorian is currently east of the state of Georgia moving north-northwest at about eight miles per hour ( (km / h), with maximum sustained winds of (mph) (km / h). It is expected to turn north on Wednesday night.

The US National Hurricane Center (NHC) warned of a “life-threatening storm surge and dangerous winds” for the coasts of Florida, Georgia, North and South Carolina, and Virginia, all the way up to Chesapeake Bay.

Graphics showed waters could rise up to 8 feet (2.4m) above ground level on the South Carolina coast, andup to (inches of rain could fall) in the coming days.

“Time to get out is running out”, the state’s Governor Henry McMaster told reporters.


“Water levels could rise well in advance of the arrival of strong winds, “the NHC said, adding these storm surges are expected” regardless of the exact track of Dorian’s center “.

Flash flooding is also expected in Georgia and in the Carolinas.

US President Donald Trump earlier held up a map incorrectly suggesting Dorian could hit Alabama. Some observers said it looked as though a line around the state was drawn with a felt pen.

The president has since said he did not know why the chart showed this.

                                                                                                      Image copyright                 Getty Images                                                  

Presidential candidate Marianne Williamson meanwhile earlier suggested on Twitter that prayer could drive the storm away. She defended her now-deleted tweet, claiming thatthose praying should not be treated with “mockery or condescension”.

What happened in the Bahamas?

Although Grand Bahama suffered severe damage and floods, the northern Abaco Islands were hardest hit. Footage taken from the air showed vast swathes of destruction. Homes, roads and businesses have been torn apart, and high waters remain.

Health Minister Duane Sands told the Washington Post 17 had died in the Abaco Islands and three on Grand Bahama. These figures are reportedly expected to rise as rescuers search through the devastated country.

“There’s nothing left in most of Marsh Harbor,” said Alicia Cook, who evacuated from the area in the Abaco Islands. “People are starting to panic: pillaging, looting.”

                                                                                                      Image copyright                 AFP / Getty                                                      
Image caption                                    Rescue and relief efforts are underway to help those affected in the Bahamas                             

Bob Cornea also spoke to the BBC in the capital Nassau after being evacuated from Marsh Harbor. He said he and his wife took shelter on the second storey of their son’s house.

“Water was up to my neck. It stayed like that for two or three hours … My son … he got us out and we got over to safety .

“We’ve been through all kinds of hurricanes, all kinds of storms: never anything that bad. I mean, it was like we were standing in the middle of the ocean. That’s what it looked like. Waves, the water just crashing in over us. Horrifying. Absolutely horrifying. “


            Interactive                            See extent of flooding in Abaco Islands caused by Hurricane Dorian    



            After Dorian


Graphic showing flooded areas after Dorian


                Before Dorian


Satellite image of Abaco Islands


The International Red Cross fears 45% of homes on Grand Bahama and the Abacos – some 13, 000 properties – have been severely damaged or destroyed.

Some 70, 000 people are in “immediate need” of aid, UN officials said.

Is climate change making hurricanes worse?

Scie ntists cannot say whether climate change is increasing the number of hurricanes, but the ones that do happen are likely to be more powerful and more destructive because of our warming climate, says BBC Weather’s Tomasz Schafernaker.

Here’s why:

  • An increase in sea surface temperatures strengthens the wind speeds within storms and also raises the amount of precipitation a hurricane will dump
  • Sea levels are expected to increase by one to four feet over the next century, bringing the potential of far worse damage from sea surges and coastal flooding during storms

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Media captionHurricanes and climate change

Use our guide to see how these deadly storms form, their devastating effects and how they are measured:









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 (km / h) 74 mph), 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 – (km / h) Some minor flooding, little structural damage.
************************************** (Storm surge 1.2m-1.5m)                                 


Winds 154 – (km / h) Roofs and trees could be damaged.
************************************** (Storm surge 1.8m-2.4m)                                 


Winds 178 – (km / h) Houses suffer damage, severe flooding
Storm surge 2.7 m-3.7m                                 


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



Winds 209 – (km / 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 252 km / 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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