Video from WZTV showed a school annex building floating down the interstate before breaking into pieces . NEW : 33 Arkansas counties are under a tornado warning , National Weather Service says . NEW : 25 counties in Tennessee are under a tornado watch , weather service says . Comment: At least 5 people have been killed in severe flooding in central Tennessee . 6-10 inches of rain has fallen in 12 hours in Nashville area .
NEW : 33 Arkansas counties are under a tornado warning , National Weather Service says . NEW : 25 counties in Tennessee are under a tornado watch , weather service says . Comment: At least 5 people have been killed in severe flooding in central Tennessee . 6-10 inches of rain has fallen in 12 hours in Nashville area .