At least seven people are dead -- five in Missouri, one in Oklahoma and one in Iowa -- after severe weather hit the Plains this week.
The damage Wednesday night was mostly concentrated in Missouri's Jasper and Howard counties.
There were three deaths in the area of Golden City, about 45 minutes northeast of Joplin, and several injuries in Carl Junction, a suburb of Joplin, according to the Missouri Department of Public Safety.
Local authorities confirmed four deaths on Tuesday, including a woman who drove around a barricade and drowned in floodwaters in Perkins, Oklahoma; a 74-year-old woman who died as a result of her home being hit by a reported tornado in Adair, Iowa; and two deaths were attributed to a car accident in heavy rain near Springfield, Missouri.
There was also concern in Webbers Falls, Oklahoma, where two barges broke free in swift water on the Arkansas River Wednesday evening and officials feared they could take out a dam downriver.
"Evacuate Webbers Falls immediately," the town said on its Facebook page. "The barges are loose and has the potential to hit the lock and dam 16. if the dam breaks it will be catastrophic!! Leave now!!"
Flood alerts were in effect in the Plains Wednesday. Another 4 inches of rain is expected in some of the already-flooded areas in the next 48 hours.
Joplin was the site of a catastrophic tornado, exactly eight years ago, on May 22, 2011. More than 150 people were killed in that natural disaster.
The Northeast is most at-risk for wind gusts, heavy rain, scattered hail and tornadoes during Thursday afternoon and evening.
The Plains will remain at risk for large hail, damaging winds and tornadoes at that time, too.
ABC News' Will Gretsky, Marilyn Heck, Reed Mcdonough and Melissa Griffin contributed to this report.