The severe weather knocked down trees, power lines and damaged homes in Georgia and Alabama on Sunday night. The National Weather Service in Huntsville said the storms struck six counties in the Tennessee Valley.
Thunderstorms, rain and possibly more severe weather was forecast for the Southeast coast Monday.
In Morgan County, Ala., Robert Irwin, 63, apparently was sitting on a couch in his mobile home watching television coverage of the storms when two trees crashed down and killed him, said Coroner Russ Beard.
"He probably never did see anything coming," Beard said. Irwin's son was in another part of the mobile home and not hurt, Beard said.
In adjacent Marshall County, a storm blew a mobile home across a road, throwing a couple out of it, Coroner Marlon Killion said. Janice Salters, 58, was killed and her husband, Wayne Salters, was seriously injured, Killion said.
To the south, the weather service said it was investigating possible tornadoes in Hale, Russell, Shelby and Blount counties.
Forecasters said hundreds of trees were blown down in Hale County southwest of Birmingham, and flash floods covered roads across north Alabama.