Debby updates: Flash flooding, tornadoes target DC, Mid-Atlantic, Northeast

A man was found dead in his home Thursday morning after a tornado tore through overnight, according to the fire chief in Rock Ridge, North Carolina.

"The tornado had completely leveled the house. ... We were initially unable to locate the victim," Fire Chief Walt Williamson said. "We called in the FEMA rescue team, which brought in a canine unit to help us find and locate the individual."

"The victim was likely asleep in his bedroom when the tornado struck," Williamson said.

"This was an incredibly challenging task, both logistically and emotionally. It's a lot of destruction to witness," he said.

The tornado also caused major damage to a school in the area, Williamson said.

"The school's roof was torn off," Williamson said. "Thankfully, this happened in the middle of the night when no one was there. If it had been during school hours, it could have been much worse."

Four tornadoes have been reported Thursday morning. A tornado watch is in effect in North Carolina and Virginia until 1 p.m. ET as Debby moves inland.

-ABC News’ Matt Foster and Jason Volack

Tropical Storm Debby made a second landfall overnight in South Carolina.

The storm has brought more than 18 inches of rain to South Carolina and another 3 to 6 inches is possible in the state on Thursday.

A rare "high risk" for flash flooding has been issued from Charlotte, North Carolina, to Roanoke, Virginia, where up to 6 inches of rain is possible on Thursday.

Thursday night, the rain and flash flooding will spread into the Blue Ridge Mountains west of Washington, D.C. By Friday, the heaviest rain will be from central Pennsylvania to upstate New York.

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Tropical Storm Debby made a second landfall early on Thursday, moving over South Carolina after regaining some strength over the Atlantic.

The storm made its landfall near Bulls Bay, a coastal about 20 miles northeast of Charleston, bringing with it a major flood treat, the National Hurricane Center said.

Maximum sustained winds were at about 50 mph as the storm hit land, weather officials said.

As of 11 p.m. ET, the center of Tropical Storm Debby is about to cross the coast of South Carolina. It will likely cross in the next few hours.

The storm's strength has remained unchanged, with maximum sustained winds remaining at 60 mph.

A Tropical Storm Warning continues from Edisto Beach, South Carolina, to Surf City, North Carolina.

Debby is currently located 25 miles east-northeast of Charleston, South Carolina and crawling at 3 mph toward the north-northwest.

A Tornado Watch remains in effect for parts of coastal North Carolina.

-ABC News Meteorologist Melissa Griffin