A tornado warning has been issued across the southern United States as a dangerous storm system threatens structures.

Millions in the South were under tornado watches on Saturday as an outbreak of severe weather hits the region just in time for post-holiday travel. January's reputation for cold and snow is well deserved, but it can also deliver tornadoes and damaging atmospheric rivers. Another house in danger of collapse in St. Charles County is being demolished.

West Feliciana Parish and north Pointe Coupee Parish are under a tornado warning until 6:15 p.m. Saturday after a severe thunderstorm, capable of producing a tornado, was located 11 miles northwest of St. Francisville, moving east at 50 mph, according to the National Weather Service.

A tornado that touched down in Brazoria County struck some homes and other structures on Saturday, the authorities said. It was a day of tornado warnings in Texas, Louisiana and Mississippi.

At least one person has died and four more were injured as several tornadoes touched down in the Houston area on Saturday, damaging homes and flipping vehicles. By Saturday afternoon, the storm system was moving east,

At least two people have died and six more are injured after several tornadoes touched down in Texas and Mississippi, damaging homes and flipping vehicles