Powerful storms that killed at least two people continued to move across the South on Sunday after spawning suspected tornadoes that left several people injured and multiple homes and businesses damaged or without power.
A tornado flattened much of the south side of the Central Texas town of Franklin, overturning mobile homes and damaging other residences, said Robertson County Sheriff Gerald Yezak.
The children, ages 3 and 8, were in the back seat with their parents in the front when the tree fell on their vehicle around 3 p.m., said Angelina County Sheriff's Department Captain Alton Lenderman.
There were reports of multiple injuries in the Robertson County town of Franklin, the NWS said, and CNN affiliate KWTX reported widespread damage there.
The National Weather Service was sending a survey team to Alto on Sunday to confirm if the storm was, indeed, a tornado.
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. Franklin is about 125 miles (200 kilometres) south of Dallas.
The tornado destroyed 55 homes, a church, four businesses, a duplex, and part of the local housing authority building, authorities said. The weather service said the system is expected to shift to the Ohio Valley and the Southeast on Sunday. None of the injuries were thought to be life-threatening.
Multiple injuries were also reported in the town of Franklin, Texas where a large preliminary EF-3 tornado with winds of 140 miles per hour moved through the town on Saturday. Some people had to be extricated from their damaged dwellings.
"The storms will take on more of a squall line set up with the greatest threats being from damaging wind gusts, flash flooding and lightning strikes", AccuWeather Senior Meteorologist Alex Sosnowski said.
University spokesman Sid Salter said some debris, possibly carried by the tornado, was found on campus, but no injuries were reported and no buildings were damaged.
The large storm system also knocked out power to thousands and caused flash floods. The 13-year-old boy drowned in a drainage area in West Monroe late Saturday afternoon, the Ouachita Parish Sheriff's Office said.
Separately, one person died when a auto was submerged in floodwaters in Calhoun, also near Monroe.
However, the area had been under a tornado warning at the time the storm hit.
Georgia's Augusta National Golf Club is included in the slight risk area Sunday as the Masters golf tournament concludes.