Severe weather has swept across America’s South, killing at least six people in Mississippi, six more in Georgia and damaging hundreds of homes from Louisiana into the Appalachian Mountains.
Many people spent part of the night early on Monday sheltering in basements, closets and bathroom tubs as sirens wailed to warn of possible tornadoes.
The Chattanooga, Tennessee area and several counties in northwest Georgia appeared to be particularly hard-hit.
Murray County, Georgia, Fire Chief Dewayne Bain told WAGA-TV that two mobile home parks were severely damaged, with five people killed and five others hospitalised after a narrow line of storms left a 8km-long path of destruction.
Another person was killed when a tree fell on a home in Cartersville, Georgia, the station reported.
At least 14 people were hospitalised in the Chattanooga area, where search and rescue teams from at least 10 fire departments were going door to door responding to more than 300 emergency calls for help, the fire department said.
The storms blew onward through the night, causing flooding and mudslides in mountainous areas, and knocking out power for about 750,000 people in a 10-state swath ranging from Texas to Georgia up to West Virginia, according to poweroutages.us.
The National Weather Service tallied hundreds of reports of trees down across the region, including many that punctured roofs and downed power lines.
Several apparent tornadoes spun up in South Carolina, where dozens of homes appeared damaged in a line from Seneca to Clemson. Emergency officials were working to open shelters in the North Carolina mountains, where up to 13cm of rain fell in a few hours.
Mississippi Governor Tate Reeves declared a state of emergency on Sunday night after he said several tornadoes had struck the state.
The National Weather Service advised that the storm front would blow into the mid-Atlantic states on Monday, bringing potential tornadoes, wind and hail.
News outlets reported downed trees, flooded streets and other damage in Alabama, Tennessee and Georgia, but the National Weather Service hadn’t immediately confirmed additional tornado touchdowns.
There were no immediate reports of serious injuries in Louisiana, even though the storm damaged between 200 and 300 homes in and around the city of Monroe, Mayor Jamie Mayo, told KNOE-TV.
Flights were cancelled at Monroe Regional Airport, where airport director Ron Phillips told the News-Star the storm caused up to $US30 million in damage to planes inside a hangar.
Originally published as Storms kill at least 12 in US