Potent thunderstorms have been blamed for one death and left more than 200,000 people without power across the southern United States — and fierce winds were expected to wallop parts of several states as new storms form Thursday, forecasters said.

Fallen trees ripped down power lines and crashed into buildings along a line from Texas to Alabama overnight and into Thursday morning, the national Storm Prediction Center reported. A few isolated tornadoes were reported, damaging roofs in the northeast Texas city of Greenville.

In Mississippi, Jackson Salter, 19, died when a tree fell on his home Wednesday night, Washington County Coroner Methel Johnson told The Delta Democrat-Times .

A utility worker walks the edge of the floodwaters submerging Broadway in Westville, N.J. Thursday, June 20, 2019. Severe storms containing heavy rains and strong winds spurred flooding across southern New Jersey, disrupting travel and damaging some property. (AP Photo/Matt Rourke)
A utility worker walks the edge of the floodwaters submerging Broadway in Westville, N.J. Thursday, June 20, 2019. Severe storms containing heavy rains and strong winds spurred flooding across southern New Jersey, disrupting travel and damaging some property. (AP Photo/Matt Rourke)

More than 70,000 homes and businesses are without power in Arkansas, and more than 30,000 outages each are reported in Texas, Louisiana and Alabama, where crews are out working to remove toppled trees and clear blocked roads.

The storms were moving eastward, with more severe weather possible Thursday in Alabama and Georgia all the way up the Eastern Seaboard to Pennsylvania, forecasters said.

An area that includes North and South Carolina, eastern Georgia and southern Virginia will see an enhanced risk of wind damage from powerful Thursday afternoon storms, the Storm Prediction Center said. The region is home to 15.6 million people and includes Charlotte, North Carolina.

A man in a home along High St. waits for rescuers to come back for him after overnight thunderstorms flooded much of Westville, N.J. on Thursday, June 20, 2019. (Elizabeth Robertson/The Philadelphia Inquirer via AP)
A man in a home along High St. waits for rescuers to come back for him after overnight thunderstorms flooded much of Westville, N.J. on Thursday, June 20, 2019. (Elizabeth Robertson/The Philadelphia Inquirer via AP)

Downburst winds — strong winds that descend from a thunderstorms and spread out when they hit the ground — appear to be the greatest threat in this area Thursday, said Dan Miller, a meteorologist at the National Weather Service in Columbia, South Carolina.

Such winds hold the potential for serious damage, such as bringing trees and powerlines down and tearing into the shingles and siding on homes, he said.

“It’s expected to all come together this afternoon and early evening,” Miller said Thursday morning.

Officials and residents gather on the edge of the floodwaters submerging Broadway in Westville, N.J. Thursday, June 20, 2019. Severe storms containing heavy rains and strong winds spurred flooding across southern New Jersey, disrupting travel and damaging some property. (AP Photo/Matt Rourke)
Officials and residents gather on the edge of the floodwaters submerging Broadway in Westville, N.J. Thursday, June 20, 2019. Severe storms containing heavy rains and strong winds spurred flooding across southern New Jersey, disrupting travel and damaging some property. (AP Photo/Matt Rourke)

Severe thunderstorm watches Thursday afternoon covered large parts of Alabama, Georgia, North and South Carolina and Virginia.

Thursday afternoon will also bring the risk of some tornadoes and very large hail to flood-weary residents of the Missouri River Valley in the Midwest, forecasters said.

In Ohio, heavy rains led to landslides and flooded highways. The Riverbend Music Center along the Ohio River east of Cincinnati postponed a Thursday evening show that was to feature country star Brantley Gilbert. The venue cited heavy rainfall and the rising river.

Floodwaters partially submerge vehicles on Broadway in Westville, N.J. Thursday, June 20, 2019. Severe storms containing heavy rains and strong winds spurred flooding across southern New Jersey, disrupting travel and damaging some property. (AP Photo/Matt Rourke)
Floodwaters partially submerge vehicles on Broadway in Westville, N.J. Thursday, June 20, 2019. Severe storms containing heavy rains and strong winds spurred flooding across southern New Jersey, disrupting travel and damaging some property. (AP Photo/Matt Rourke)

Flooding already was causing travel problems, flooding commuter train stations and forcing service to be suspended between Philadelphia and New Jersey. The Delaware River was overflowing its banks in places, and people were being rescued from high water.

A supermarket roof collapsed in suburban Philadelphia, causing sprinkler system pipes to break and send water gushing down.

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A woman shields from the rain with an umbrella as she walks near 5th and Market street in Center City, Philadelphia. Wednesday, June 19, 2019.  (Jose F. Moreno/The Philadelphia Inquirer via AP)
A woman shields from the rain with an umbrella as she walks near 5th and Market street in Center City, Philadelphia. Wednesday, June 19, 2019. (Jose F. Moreno/The Philadelphia Inquirer via AP)
Parishioners pump out floodwater inside the Macedonia Baptist Church in Westville, N.J. Thursday, June 20, 2019. Severe storms containing heavy rains and strong winds spurred flooding across southern New Jersey, disrupting travel and damaging some property. (AP Photo/Matt Rourke)
Parishioners pump out floodwater inside the Macedonia Baptist Church in Westville, N.J. Thursday, June 20, 2019. Severe storms containing heavy rains and strong winds spurred flooding across southern New Jersey, disrupting travel and damaging some property. (AP Photo/Matt Rourke)
Rescuers guide boats on High St as they bring people to safety after overnight thunderstorms flooded much of Westville, N.J. on Wednesday, June 20, 2019. ( Elizabeth Robertson/The Philadelphia Inquirer via AP)
Rescuers guide boats on High St as they bring people to safety after overnight thunderstorms flooded much of Westville, N.J. on Wednesday, June 20, 2019. ( Elizabeth Robertson/The Philadelphia Inquirer via AP)
Severe storms containing heavy rains and strong winds spurred flooding across New Jersey, disrupting travel and damaging some property. The storms started Wednesday night and continued for several hours through early Thursday. (June 20)
Severe storms containing heavy rains and strong winds spurred flooding across New Jersey, disrupting travel and damaging some property. The storms started Wednesday night and continued for several hours through early Thursday. (June 20)
A severe storm that local officials reported as a tornado struck the northeast Texas city of Greenville, causing widespread tree and roof damage. There were no immediate reports of injuries. (June 20)
A severe storm that local officials reported as a tornado struck the northeast Texas city of Greenville, causing widespread tree and roof damage. There were no immediate reports of injuries. (June 20)