Houston, Texas — A strong storm system threatened to whip up tornadoes in parts of the U.S. Southeast on Sunday, a day after severe weather claimed at least two lives as twisters touched down in Texas and Mississippi. The National Weather Service’s severe storm tracker indicated the system was moving east through Alabama into Georgia shortly before 4 a.m. The agency issued severe thunder storm warnings with the possibility of tornadoes in western Georgia, the northwestern tip of Florida and elsewhere. On Saturday, one person died in the Liverpool area, located south of Houston, Texas. Four people suffered injuries that