Tornadoes Sweep Across the South and Midwest, Killing at Least 7

At least seven people have been killed in Tennessee, Missouri and Indiana, officials said on Thursday, after more than 30 tornadoes, combined with hail and heavy rains, swept through the South and Midwest, flooding streets, snapping power lines and flattening homes and businesses.

The flooding was expected to worsen as the storm stalls over the region, putting millions under severe weather advisories over the next few days. Officials warned that a “generational flooding” disaster was possible as more than a foot of rain could fall, pushing swollen rivers and creeks over their banks.

Cities and counties across the Midwest and South were ramping up efforts to prepare for the severe flooding that was predicted for the days ahead. Officials said that schools in some districts in Tennessee and Kentucky would be closed on Friday.

The Army Corps of Engineers said it had filled about 1,500 sandbags to reinforce a levee near Poplar Bluff, Mo., where the Black River was expected to surge to near-record flood levels over the weekend. An urban search-and-rescue team was also deploying to the area.

Gov. Mike Braun of Indiana said he was activating the National Guard to help with the storm response.

As much as 10 to 15 inches of rain could fall through the weekend, the National Weather Service said. The most intense rain was expected in Arkansas and Tennessee, where floodwaters were rising in parts of Nashville and rescues were underway.