Hurricane Sally uprooted trees, flooded streets and cut power to hundreds of thousands of homes and businesses on Wednesday as the powerful storm brought “historic and catastrophic” flooding to the Alabama-Florida coast, the US National Hurricane Center (NHC) said.
Some parts of the Gulf Coast have already been inundated with more than 46 cm (18in) of rain in the last 24 hours, with more precipitation expected even as the storm's winds slow, the NHC said. The winds howled fast enough to topple a tractor-trailer onto its side as it was driven down an Alabama highway, according to video published by CBS News.
The coastal resort community of Pensacola, Florida, suffered up to 1.5m (5ft) of flooding and travel was cut by damaged roads and bridges. More than 500,000 homes and businesses across the area were without power as the storm knocked over stately oak trees and tore power lines from poles.
The storm was moving at a slow 8 km-per-hour (5 mile-per-hour) pace toward the Alabama-Florida border but was predicted to pick up speed, the NHC said.
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“The rain is what stands out with this one: It’s unreal,” said Cavin Hollyhand, (50) who left his home on a barrier island and took shelter in Mobile, Alabama, where he viewed the damage on Wednesday. Some isolated areas could see up to 89cm (35 in) of rain before Sally is done, the NHC said.
Upon landfall at Gulf Shores, Alabama, Sally’s winds were clocked at 165 kph (105 mph). Along the coast, piers were ripped away by the storm surge and winds.
Alabama Governor Kay Ivey told residents not to go outside to check on damage unless necessary, and to stay away from live power lines and fallen trees.
“We had strong winds for a long period of time,” said 38-year-old Grant Saltz as he took a break from clearing debris outside his Mobile restaurant. “Instead of a few hours we got it for 12 hours.”
In Pensacola, wind gusts were clocked at 125 kph (77 mph)on Wednesday, and images on social media showed major floods. One witness reported hailstorms in the city as well and the NHC warned of possible tornados.
City police in Pensacola told residents not to drive around looking at damage due to high winds.
“We see lots of ‘lookers’ out,” the department wrote on Twitter. “It’s slowing our progress down. Please stay at home!”
Sally is the 18th named storm in the Atlantic this year and the eighth of tropical storm or hurricane strength to hit the United States. There are three named storms in the Atlantic, none now threatening the United States.
“We’ve only got one name left,” said Jim Foerster, chief meteorologist at DTN, an energy, agriculture and weather data provider, referencing the procedure to name storms. “That’s going to happen here soon, Wilfred, and then we’ll be into the Greek alphabet.”
Hurricane have increased in their intensity and destructiveness since the 1980s as the climate warms, according to researchers at the US National Oceanic and Atmospheric Administration. Climate change is also a factor in the increasing frequency of record-breaking wildfires plaguing the western United States, scientists say.
Damage from Sally is expected to reach $2 billion to $3 billion, said Chuck Watson of Enki Research, which tracks tropical storms and models the cost of their damage. That estimate could rise if the heaviest rainfall happens over land, Watson said.
As the storm moved east and inland, ports on the western Gulf Coast were reopened to travel and energy companies were beginning to return crews to offshore oil platforms.
Sally shut more than a quarter of US Gulf of Mexico offshore oil and gas production. Two coastal oil refiners halted or slowed operations, adding to existing outages from last month's Hurricane Laura and pandemic-related demand losses.–Reuters