They were in the back seat with their parents in the front, Angelina County Sheriff's Department Capt. Alton Lenderman said. However, although police were able to remove both children from the vehicle, they were pronounced dead at the scene.
Monroe County Coroner Alan Gurley says multiple people were injured and multiple homes were damaged in Hamilton, Mississippi, which is 140 miles (225 kilometers) southwest of Memphis, Tennessee. At least one mobile home was destroyed, throwing a man from the mobile home.
And Sunday, an enhanced risk (level 3 out of 5) stretches from Atlanta to Cleveland.
The large storm system also knocked out power to thousands and caused flash floods. Starting out with hit and miss storms this morning, storms should remain below severe limits early but that all changes later today.
The energy from warm afternoon temperatures will diminish, but the risk for tornadoes will not be over.
"The storm is so vigorous that tornadoes are still possible after dark", Myers said.
Tornado damage seen over the weekend.
The threat of severe weather will likely increase throughout the day, the National Weather Service's Storm Prediction Center said. By the time it moves into our area the line will be broken with scattered storms.
Portions of Chicago saw some snow and while it began slowing down Sunday afternoon, the weather service said snow-covered surfaces may pile up to an inch of snow.
Winds of up to 60 miles per hour (96.56 kph) were reported in Cherokee County, Texas, damaging two homes in Alto but not injuring anyone. At least 11 tornadoes have touched down in three different states as a result of a stronger-than-usual storm system.
"The main severe weather threats are damaging wind gusts and an isolated tornado".