NEW : Severe weather outlook improves for Canadian , mid-Atlantic . at least six deaths have been reported in Tennessee . The damage in Missouri is in the tens of millions , Missouri 's governor says . Harrisburg , Illinois , is among the hardest hit , with Three deaths .
NEW : Severe weather outlook improves for Southeast , mid-Atlantic . Three deaths have been reported in Tennessee . The damage in Branson is in the tens of millions of dollars , Missouri 's governor says . Harrisburg , Illinois , is among the hardest hit , with at least six deaths .