Around 2 million people across the South braced for more devastating flooding and hail on Monday after days of relentless rain and violent thunderstorms left six dead and triggered evacuations.
Flash-flood warnings were issued in Louisiana, Missouri and Tennessee overnight and into the morning, according to the National Weather Service.
Parts of Kentucky, Tennessee, Arkansas, Mississippi, Alabama, Louisiana and Texas were also under flood or river warnings as of around 5 a.m. on Monday, Weather Channel meteorologist Kevin Roth said.
Some 12 tornadoes or possible tornadoes were reported in Arkansas Sunday and overnight, Roth added. No injuries or deaths were reported.
The ongoing storm was aggravating flooding in major rivers, especially along the Louisiana-Texas border, with some 3,300 residents having been evacuated in Louisiana alone, The Associated Press reported. President Barack Obama signed an order declaring the flooding in Louisiana a major disaster on Sunday.