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

Rain is ongoing in North Carolina and Virginia. The highest risk for flash flooding on Thursday is across central North Carolina and into western Virginia, where rainfall rates could reach 2 inches per hour.

Overnight, major flooding will be possible in western Virginia and western Maryland.

On Friday, the heavy rain will target Washington, D.C., Maryland, Pennsylvania and western New York. There’s a significant risk for flash flooding across the interior Northeast, from western Maryland to central Pennsylvania to upstate New York.

By Friday evening, the rain will reach Philadelphia and New York City, where flash flooding is possible.

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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.