Alabama was on alert Saturday for more extreme flooding, a day after a tornado touched down in Birmingham.
The twister left a two square-mile swath of destruction as heavy rains and flooding continued to hammer the state, which along with much of the rest of the southeastern U.S., has seen heavy downpours since Wednesday.
The severe weather has killed at least 17 people, destroyed homes, and broken records for rainfall. But the threat wasn't over: Residents in northern Alabama were in for moderate to severe flooding Saturday, according to the National Weather Service.
Major flooding was forecast for Big Nance Creek, which runs through the town of Courtland. The creek isn't expected to fall below flood stage until Monday.
And a flood warning remained in effect for the Coosa River, which was threatening the city of Gadsen.
More from NBCNews.com:
Meanwhile, in the tiny town of Elba in southern Alabama, volunteers distributed sandbags around the Pea River, projected to crest Saturday at 43 feet — a foot below the levees surrounding it. A volunteer evacuation order was issued.
Alabama Gov. Robert Bentley toured Elba Saturday and met with families whose homes had flooded. Two people are missing in the floodwaters, he said.
The governor, who on Thursday declared a state of emergency for Alabama, said 190 roads were closed throughout the state Saturday, impacting every county. He planned to tour other affected areas later in the day.
Meanwhile, Jefferson County was recovering from the twister that touched down at around 5 p.m. CT (6 p.m. ET) Friday.
Four people had been transported to local hospitals with minor injuries, said Jefferson County Emergency Management Agency Director Jim Coker.
Birmingham's city government said earlier that several structures had been destroyed and that first responders were working to rescue people from the debris. Friday's twister had a preliminary rating of EF-2, with winds of up to 130 mph, according to the National Weather Service.