PHILADELPHIA — The weather system previously known as Hurricane Debby was not quite done with parts of the U.S. Sunday as flood warnings remained in effect in North Carolina and thousands were without power in New York, Ohio and Pennsylvania.

After hitting Florida as a hurricane Aug. 5, the storm spent nearly a week unleashing tornadoes and flooding, damaging homes and taking lives along the East Coast before moving into Canada on Saturday.

While many rivers had receded by Sunday, flood warnings remained in effect across central and eastern North Carolina, where more thunderstorms were possible over the next few days. With the ground already saturated from Debby, the National Weather Service said localized downpours could result in additional flash flooding throughout the coastal Carolinas.

In New Bern, North Carolina, business was brisk at the Halftime Pub and Grub restaurant Sunday afternoon just after a flash flood warning was issued, said server Chastity Bettis.

“Right now, it’s thundering, sprinkling and pretty dark so I’d say it’s going to start raining hard here pretty soon,” she said. “If you live here, you’re pretty used to hurricane season and it being like this, but the last week or two we’ve been getting it pretty rough.”

In South Carolina, the National Weather Service’s Charleston office warned Sunday that as much as 3 to 4 inches of additional rainfall was possible in the afternoon and evening, and could lead to flash flooding.

Even in drier areas, more than 35,000 homes and businesses in Ohio, New York, Pennsylvania and Vermont still had no electricity as of Sunday afternoon, according to the tracking website PowerOutage.us. Some 23,000 outages lingered in hard-hit Ohio, where Debby-related storms including tornadoes blew through the northeastern part of the state on Wednesday.