The next round of severe weather, including tornadoes, damaging winds and hail, is expected to start later this week when a potent storm moves from the Rockies into the Central Plains.
In Monroe County, Mississippi, a 95-year-old man identified as Roy Ratliff, died after a tree fell on his mobile home.
A massive storm system killed eight people in the South over the weekend and caused damage from Texas to Mississippi. A vehicle fatally struck a county worker in Hueytown, a suburb outside Birmingham, the Jefferson County sheriff's office said on Twitter.
"Strong winds will blow around unsecured objects and may blow down tree limbs and power lines".
Multiple people have been reported injured as tornadoes continued to flare along the Mississippi-Alabama state line late Saturday and early Sunday.
In Mississippi, Governor Phil Bryant said one person was killed and 11 injured over the weekend as tornadoes ripped through 17 counties and left 26,000 homes and businesses without electricity. There were no immediate reports of injuries there.
About 65,000 homes and businesses are without power in Louisiana, Mississippi, and Alabama along the path of storms crossing the region. Cherokee County Judge Chris Davis said the fatality that was reported was of a woman who died of her critical injuries. Earlier, two children died in East Texas after a tree fell on their moving auto.
Although Mother Nature put on a wild show before sunrise, with waves of thunderstorms prompting a tornado watch across most of the state and a tornado warning in parts of South Jersey, no funnel clouds reaching the ground have been confirmed so far by the National Weather Service, according to meteorologist Trent Davis.
In Pollok, Texas - about 150 miles (240km) southeast from Dallas - two children were killed when their family vehicle was hit by a falling pine tree.
A wind advisory has been issued for the region by the National Weather Service for sustained west winds of 25 to 25 miles per hour and gusts up to 50 miles per hour.
According to Capt Alton Lenderman of the Angelina County Sheriff's Office, the tree "flattened the auto like a pancake", but the parents, who were riding in the front of the vehicle, were not injured.