Tropical Storm Debby drenches U.S. Southeast with rain, high water as it drifts along the Atlantic coast

CHARLESTON, S.C. -

Tropical Storm Debby drenched coastal cities in Georgia and South Carolina, stirred up tornadoes and submerged streets with waist-high floodwaters Tuesday, just the beginning of a prolonged storm that could dump staggering rain totals of up to 25 inches (64 centimetres).

Charleston and Savannah, Georgia, took the first blow, with up to a foot (30 centimetres) of rain falling along the coast between the two cities in just over 24 hours. Police blocked all roads into Charleston's downtown peninsula to everyone but essential workers and emergency personnel. Dozens of roads were closed in the historic city because of flooding similar to what it sees several times a year because of rising sea levels.

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As Debby swirls just offshore, the heavy rain is expected to move north into parts of South and North Carolina that have already seen two billion-dollar floods in eight years.

In one Savannah neighbourhood, firefighters used boats to evacuate some residents and waded through floodwaters to deliver bottled water and other supplies to those who refused to leave.

Michael Jones said water gushed into his home Monday evening, overturning the refrigerator and causing furniture to float. Outside, the water seemed to be everywhere and was too deep to flee safely. So Jones spent a sleepless night on his kitchen table before firefighters going door to door came in a boat Tuesday morning.

"It was hell all night," Jones said, adding, "It was a struggle, but God is good."

In Charleston, Mayor William Cogswell said the road closures have kept businesses and homes from unnecessary damage and avoided the need for any high-water rescues.

"We especially don't need any yahoos driving through the water and causing damage to properties," Cogswell said.

South Carolina Gov. Henry McMaster said Debby has not been as bad as feared so far, but he warned that the slow-moving storm was far from over.

It will be a nervous few days for northern South Carolina and southern North Carolina, where forecasters warned of up to 15 inches (38 centimetres) of rain. Those totals are close to what the region saw in a historic flood from Hurricane Matthew in 2016. Then two years later, many of those records were broken during Hurricane Florence. Both storms killed dozens.

North Carolina and Virginia have both declared a state of emergency.

"The effects of Debby are far-reaching, and our neighbouring states are facing significant challenges," Virginia Gov. Glenn Youngkin said.

Several areas along North Carolina's coastline are prone to flooding, such as Wilmington and the Outer Banks. Virginia could see impacts including strong winds, heavy rains and flooding.

Debby's centre was about 30 miles (50 kilometres southeast of Savanah on Tuesday night, according to a bulletin from the National Hurricane Center. It had maximum sustained winds of 40 m.p.h. (65 km/h) and was heading east-northeast at 3 m.p.h. (6 kmh).

The storm was forecast to slowly move out to sea, then creep back onshore over South Carolina on Thursday morning.

"Tropical cyclones always produce heavy rain, but normally as they're moving, you know, it doesn't accumulate that much in one place," said Richard Pasch, of the hurricane centre. "But when they move very slowly, that's the worst situation."

People wade into the flood waters overcoming Gordon Street as rain continues to fall from Tropical Storm Debby, Tuesday, Aug. 6, 2024, in Charleston, S.C. (Henry Taylor/The Post And Courier via AP)

There will be lulls in the rain as dry spells appear between bands around the centre of the poorly organized storm, forecasters said. But some bands will be heavy and keep moving over the same places.

Green Pond in rural Colleton County, South Carolina, reported the most rain so far, just over 14 inches (36 centimetres). A nearby dam had water run over its top but did not crumble, while trees and washouts blocked a number of roads, county Fire-Rescue Assistant Chief David Greene said.

Close to a foot (30 centimetres) fell down coast from Charleston to Savannah, where the National Weather Service reported 6.68 inches (17 centimetres) just on Monday. That's already a month's worth in a single day: In all of August 2023, the city got 5.56 inches (14.1 centimetres).

Tornadoes knocked down trees and damaged a few homes on Kiawah Island and Edisto Island. A Walmart, an Arby's and other businesses were damaged and several vehicles flipped in Moncks Corner, about 30 miles (48 kilometres) inland from Charleston.

As the heavy rain shifted up the coast Tuesday, Crooked Hammock Brewery in North Myrtle Beach decided to close early.

"Flash flooding is super unpredictable, and we'd rather our staff and guests be home and safe," marketing coordinator Georgena Dimitriadis said.

Far to the north in New York City, heavy storms that meteorologists said were being enhanced by Debby flooded some streets and expressways, stranding motorists. The National Weather Service issued a flood watch until noon Wednesday for the entire city.

Emergency officials warned of potential flash flooding, flying drones with loudspeakers in some neighbourhoods to tell people in basement apartments to be ready to flee at a moment's notice.

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Debby made landfall as a Category 1 hurricane early Monday along the Gulf Coast of Florida.

At least six people have died due to the storm, five of them in traffic accidents or from fallen trees. The sixth death involved a 48-year-old man in Gulfport, Florida, who was on his anchored sailboat and whose body was recovered after a person saw the vessel had partially sunk, WTSP-TV reported.

About 500 people were rescued Monday from flooded homes in Sarasota, Florida, police said. Just north of Sarasota, Manatee County officials said more than 200 people were rescued.

Officials said it may take two weeks to fully assess the damage in parts of north central Florida as they wait for rivers to crest.

"You're going to see the tributaries rise. That's just inevitable. How much? We'll see," Florida Gov. Ron DeSantis said Tuesday. "It may be that it's not flooded today and it could be flooded tomorrow."

Georgia Gov. Brian Kemp also warned of more rain and flooding to come, saying, "Do not let this storm lull you to sleep."

More than 155,000 customers remained without power in Florida and Georgia on Tuesday morning, down from more than 350,000, according to PowerOutage.us and Georgia Electric Membership Corp. More than 20,000 others were without power in South Carolina early Tuesday.

President Joe Biden approved emergency declarations making federal disaster assistance available to Florida, Georgia and South Carolina.

Debby is finally forecast to pick up speed Thursday, and it could move up the middle of North Carolina, through Virginia and into the Washington area by Saturday.

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Collins reported from Columbia, South Carolina. Contributors include Jeff Martin and Sudhin Thanawala in Atlanta; Freida Frisaro in Fort Lauderdale, Florida; Kate Payne in Tallahassee, Florida; and Ben Finley in Norfolk, Virginia; and freelance photographer Stephen B. Morton in Savannah, Georgia.