Parts of North Carolina still recovering from Helene could see 5 inches of rain. Flash flooding concerns stretched into Pennsylvania.

A flash flood warning is issued when a flash flood is either imminent or already occurring. In flood-prone areas, it’s crucial to move immediately to higher ground. A flash flood is a sudden and violent inundation that can develop within minutes to hours, and it can even happen in areas not currently experiencing rainfall.

Heavy rain will continue through 7 a.m. in Philadelphia and last longer in spots north of the city. Localized flooding, poor visibility and road spray are the biggest concerns.

Flood advisories were in effect as a dozen states were at risk of severe storms, tornadoes and hail. Some areas could see 2 months' worth of rain.

Waves of heavy rain continue to pound parts of New Jersey Wednesday afternoon as isolated thunderstorms and downpours sweep across the state, sparking flash flood warnings in six counties. The hardest-hit areas so far are Burlington and Camden counties,

The National Weather Service issued a weather alert at 4:05 p.m. EDT on Wednesday for rain until 9 p.m. EDT for Leelanau, Benzie, Grand Traverse and Manistee counties.

The Weather Channel expects rain to stop around 9 a.m., but cloudy conditions to remain the rest of Wednesday. More rain and possibly thunderstorms are in the forecast for Thursday, Friday and Saturday afternoons, the weather service says.

Rainfall is on track to fall late Wednesday night and early Thursday morning in Massachusetts, with a chance for more severe weather to come this weekend.

Managing stormwater is about more than just ditches, and it’s easy for Johnson County residents to get involved with their own properties. Contain the Rain, a countywide program, helps with the costs and guides people to find sustainable solutions that also reduce water pollution.

At 10:42 a.m. on Wednesday, the National Weather Service released a flood watch valid between 1 p.m. and 10 p.m. for Westmoreland Ridges and Fayette Ridges as well as Westmoreland and Fayette counties.

A flood advisory was released by the National Weather Service on Wednesday at 3:09 p.m. in effect until 5 p.m. for Union County.