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MEMPHIS, Tenn. — Violent storms and tornadoes tore through cities from Oklahoma to Indiana during what could be a record-setting period of deadly weather and flooding, destroying homes and sending debris nearly 5 miles into the air in one location.
Dozens of tornado and severe thunderstorm warnings were issued Wednesday and early Thursday from Texas to West Virginia as storms hit those and other states. Forecasters attributed the violent weather to daytime heating combining with an unstable atmosphere, strong wind shear and abundant moisture streaming into the nation's midsection from the Gulf.
Sgt. Clark Parrott of the Missouri Highway Patrol said at least one person was killed in southeast Missouri, KFVS-TV reported, while part of a warehouse collapsed in a suburb of Indianapolis, temporarily trapping at least one person inside. In northeast Arkansas a rare tornado emergency was issued as debris flew thousands of feet in the air.
The Tennessee Department of Health confirmed two weather-related fatalities, one in McNairy County and the other in Obion County, the Tennessee Emergency Management Agency announced early Thursday.
The coming days were also forecast to bring the risk of potentially deadly flash flooding to the South and Midwest as severe thunderstorms blowing eastward become supercharged. The potent storm system will bring "significant, life-threatening flash flooding" each day through Saturday, the National Weather Service said.
With more than a foot of rain possible over the next four days, the prolonged deluge "is an event that happens once in a generation to once in a lifetime," the weather service said. "Historic rainfall totals and impacts are possible."
More than 90 million people were at some risk of severe weather in a huge part of the nation stretching from Texas to Minnesota and Maine, according to the Oklahoma-based Storm Prediction Center.
Tornadoes touch down, and more could be coming
A tornado emergency — the weather service's highest alert — was briefly declared around Blytheville, Arkansas, on Wednesday evening, with debris lofted at least 25,000 feet, according to Chelly Amin, a meteorologist with the service.
"It's definitely going to be a really horrible situation here come sunrise in the morning in those areas," Amin said.
A tornado was also reported on the ground near Harrisburg, Arkansas, in the evening.
The Arkansas Division of Emergency Management reported that there was damage in 22 counties due to tornadoes, wind gusts, hail and flash flooding. At least four people were injured, but there were no reports of fatalities as of Wednesday evening.
In Kentucky, a tornado touched down Wednesday night around Jeffersontown, a suburb of Louisville, passing the Interstate 64 and Interstate 265 interchange, according to the weather service.
Four people were injured in Kentucky when a church was hit by debris from a suspected tornado, according to Ballard County Emergency Management. One person was in critical condition, while the others have non-life-threatening injuries.
Warehouse collapse is part of damage in Indiana
Two workers were injured at a Sur La Table distribution center in Brownsburg, Indiana, that was significantly damaged in the storm Wednesday, a company spokesperson said in a statement.
Emergency crews worked for several hours to free a trapped worker at the distribution center, where the roof and a wall collapsed.
"It was just heavy debris that had fallen on top of her," Brownsburg Fire Department spokesperson Kamrick Holding told WTHR-TV. "She happened to be in the wrong place at the wrong time."
The woman was conscious and talking to a doctor during the rescue and was taken to a hospital. Her condition was not immediately known.
Five semitrucks were blown over on Interstate 65 near Lowell, Indiana, state police reported.
The town of Delta, in southern Missouri, which has under 400 people, had downed powerlines and trees, and damaged buildings. Road entrances to the town were blocked off.
"There is too much damage in town," Superintendent David Heeb posted online. "We need to give our families a chance to regroup and take care of the things they need to focus on right now."
A tornado touched down in the northeastern Oklahoma city of Owasso on Wednesday, according to the weather service. There were no immediate reports of injuries, but the twister heavily damaged the roofs of homes and knocked down power lines, trees, fences and sheds.
Power was knocked out to more than 330,000 customers in Indiana, Ohio, Kentucky, Arkansas, Mississippi, Missouri, Illinois and Tennessee as of Thursday morning, according to PowerOutage.us, which tracks outages nationwide.
Floods could inundate towns, sweep cars away
A line of thunderstorms dropped heavy rain through parts of Indiana on Wednesday night. At least one street was flooded in Indianapolis, with water nearly reaching the windows of several cars, according to the city's metropolitan police department. No one was in the vehicles.
Additional rounds of heavy rain were expected in parts of Texas, the lower Mississippi Valley and the Ohio Valley from midweek through Saturday. Forecasters warned that they could track over the same areas repeatedly, producing dangerous flash floods capable of sweeping cars away.
Middle Tennessee was looking at severe storms followed by four days of heavy rains as the front stalls out and sticks around through the weekend, according to NWS meteorologist Mark Rose.
"I don't recall ever seeing one like this, and I've been here 30 years," Rose said. "It's not moving."
Contributing: Andrew DeMillo, Adrian Sainz, Seth Borenstein, Isabella O'Malley, Ed White, and Hallie Golden
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