Eight people are reported to have been killed in Texas after new tornadoes, raising the death toll to 26 in a week of storms in several US states.
Local media said five people in cars were probably blown off a motorway in Garland, near Dallas. Another three bodies were found in nearby towns.
Officials also say Texas and Oklahoma could suffer a “historic blizzard”, bringing up to 41 cm of snow.
The storms across the south have been unusually powerful for winter, BBC reported.
Reports from Texas said churches were destroyed, cars mangled and trees toppled across a wide area.
Garland police believed that “winds from a tornado that passed through” the town late on Saturday were the cause of car accidents, Melinda Urbina from the Dallas County Sheriff’s office told the BBC.
At least five people were reported dead in the cars.
Urbina said the winds “tossed the cars around” and the vehicles were later found below Interstate 30, about 24 km northeast of Dallas. She also urged local residents to stay off the roads.
Police officers in Garland are now trying to determine whether there were any other casualties at the crash site.
Two people were found dead at a gas station in Copeville and a third was killed in Blue Ridge, reports in local media said.
Several power lines were down and there were reports of burst gas lines.
While extreme weather in the US before Christmas is not unknown, meteorologists say unseasonably high temperatures in some areas contributed to the severity of the storms.
