Tornadoes in Texas killed two and destroyed homes.
The storm system's death toll rose to at least five on Sunday, when authorities reported the death of a Texas woman whose mobile home was destroyed Saturday night.
Authorities in MS have identified the man who they say was killed after a tornado struck his town.
Monroe County Coroner Alan Gurley identifies him as Roy Ratliff, 95.
In addition to the potential for tornado development, the strong line of storms will also produce damaging winds and heavy rain, capable of producing flash floods, particularly in Arkansas and parts of MS and Alabama.
Two children, ages 3 and 8, were killed when a tree fell on their vehicle as storms hammered east Texas.
By late Saturday, the storms were expected to organize into a line as they cross the western border of Mississippi. They were in the back seat with their parents in the front, said Angelina County Sheriff's Department Capt. Alton Lenderman.
National Weather Service meteorologist John Moore said a possible twister touched down Saturday in the Vicksburg, Mississippi, area.
The fire station in Hamilton was destroyed, as were multiple homes and a retail center.
He said the threat for severe weather is greatest at such times. Trees were down throughout the hilly city on a bluff overlooking the Mississippi. We have a lot of flooding, there are several trees down. The primary threats include: large hail, damaging wind gusts up to 70 miles per hour and a tornado or two is possible mainly in locations in the southern portion of the outlined watch area. "We are just a mess".
Riley Carter, left and Thomas Boles, center help Jerry Whitaker, right clean up the remains of his brothers house on Seely Drive outside of Hamilton, Miss. after a storm moved through the area on Sunday, April 14, 2019.