(CNN) Even if it doesn't rain another drop in Missouri, Kathy Wunderlich's home in West Alton may still get flooded.

Recent deluges have engulfed towns, homes, fields and roads in deadly floodwater. Though the storms are gone, the rivers have kept rising from Texas to Illinois.

In West Alton, near St. Louis, runoff pushed the Mississippi River over the levees on Tuesday, and Wunderlich was headed for higher ground with her belongings in tow.

Wednesday morning, aerial cameras captured parts of the greater St. Louis area under water. A shopping area was half submerged, a sign for a Jimmy John's sandwich shop at the top of a building still visible above the water line.

A woman walks down a flooded road to get back to her home in Eureka, Missouri, before evacuating on December 28.

A woman walks down a flooded road to get back to her home in Eureka, Missouri, before evacuating on December 28.

Men help move furniture out of a gift shop as a precaution on December 28 in Kimmswick.

Men help move furniture out of a gift shop as a precaution on December 28 in Kimmswick.

A load of gravel is dumped in an effort to hold back rising floodwaters in Kimmswick on December 28.

A load of gravel is dumped in an effort to hold back rising floodwaters in Kimmswick on December 28.

Cars are submerged in flood waters in Kimmswick on December 28.

Cars are submerged in flood waters in Kimmswick on December 28.

A man in Carthage airs out his truck, which he said had been submerged by floodwaters, on December 29.

A man in Carthage airs out his truck, which he said had been submerged by floodwaters, on December 29.

A family displaced by flooding passes time on December 29 at Fairview Christian Church in Carthage, Missouri, where the Red Cross set up a shelter.

A family displaced by flooding passes time on December 29 at Fairview Christian Church in Carthage, Missouri, where the Red Cross set up a shelter.

Water from the Bourbeuse River floods a McDonald's in Union, Missouri, on December 29.

Water from the Bourbeuse River floods a McDonald's in Union, Missouri, on December 29.

Homes are flooded in Pacific, Missouri, on Tuesday, December 29. Torrential rains over the past several days have pushed already swollen rivers and streams to new heights in parts of Missouri.

Homes are flooded in Pacific, Missouri, on Tuesday, December 29. Torrential rains over the past several days have pushed already swollen rivers and streams to new heights in parts of Missouri.

North Little Rock, Arkansas, firefighters look at the Arkansas River as it threatens a parking lot on January 1.

North Little Rock, Arkansas, firefighters look at the Arkansas River as it threatens a parking lot on January 1.

Matt Gerling, left, and Shane Menetzke clean debris from the concession stand of the Pacific Youth Assocation sports complex on January 1 in Pacific, Missouri.

Matt Gerling, left, and Shane Menetzke clean debris from the concession stand of the Pacific Youth Assocation sports complex on January 1 in Pacific, Missouri.

Buildings in the Tree Court Industrial Boulevard area of St. Louis remain flooded on January 1 after more than 10 inches of rain fell.

Buildings in the Tree Court Industrial Boulevard area of St. Louis remain flooded on January 1 after more than 10 inches of rain fell.

Volunteers collect donations for flood victims at Fox High School in Arnold, Missouri, on Saturday, January 2.

Volunteers collect donations for flood victims at Fox High School in Arnold, Missouri, on Saturday, January 2.

"We emptied out our basement of anything important, which is strictly storage anyway. We cleaned out the house of clothes. Things that can't be replaced. Important pieces of furniture," Wunderlich told CNN affiliate KMOV.

A visibly exhausted James Harris told KMOV that if his house floods, he's not moving back. "It wears you out," he said. "This is the last time I'm going to do this."

Early Wednesday morning, rescuers reached Jean Scott's trailer in the tiny town of Pacific, Missouri. Water was approaching her door, she said.

"They came and got us and put us in a raft and took us across the railroad tracks," Scott said.

The rescuers took her to a nursing home where "everybody is real friendly," she said.

But she worries that her home is devastated. No one has given her an update. She's also concerned about her neighbors.

"I really feel for the people. I really do. My heart goes out to them," she said, adding that she has no patience for people who take risks.

"Some of these people on the highway trying to drive through this stuff -- they're very stupid," she said.

Mother Nature can be a bitch. This is the town I work in covered up in flood water. 😳 Had 2 take a 30 min detour. pic.twitter.com/wRw5mQfGLY — Scott Clemenson (@ScottClemenson) December 30, 2015

400 gauges over flood stage

Wunderlich and Scott are among 12.1 million people nationwide living in areas where there are flood warnings, the National Weather Service said in a 3 p.m. Wednesday statement. The figure dropped from 17 million as flood warnings were canceled in parts of Missouri and Illinois.

A 24-mile stretch of I-44 is closed from Interstate 270 in St. Louis County to the Highway 100 exit in Gray Summit in Franklin County, authorities said. Many people are in hotels and all are encouraged to stay off the roads.

Throughout the country's midsection about 400 river gauges are over flood stage, with around 45 showing major flooding, the National Weather Service said.

Many of those are in or around St. Louis. Some rivers and streams have already crested, and some haven't yet, like the Mississippi. It is expected to reach its peak late Wednesday or early Thursday in Missouri along with other area streams.

Missouri will still have "major to historic river flooding through early next week," the National Weather Service's St. Louis office said. "Record crests expected on area rivers the next several days."

State of emergency

"We've never seen water this high," Missouri Gov. Jay Nixon told CNN's "New Day." "The Meramec River is going to be 4 feet over its historic level."

At its peak, the Mississippi should be at its highest level ever, Nixon said, beating the highest level of the great flood of 1993.

"That's why we've got a state of emergency," he said. But it is expected to drain off rapidly, so he is hopeful the cleanup phase will begin soon.

Mighty rivers are cresting this week, at some points over historic levels, as Missouri copes with widespread flooding

The town of Union is already moving into cleanup mode.

"The river crested (there) yesterday," said emergency manager Russell Ross. Floodwater has receded from a major highway there, but it is yet to be reopened, because it needs to be checked over.

Water creeping up the sandbags

Nixon has activated the National Guard to aid first responders and provide security in evacuated areas like Valley Park. Residents have volunteered by the dozens to fill sandbags and then pass them hand to hand to be transported or laid in place.

For those of you I'm not friends with on snapchat.. The dam is looking like niagra.🌊😳 #flood #wow #puppy #water #dam @kykyschuller A video posted by Kristin Yancey™ (@kristinleeyancey) on Dec 30, 2015 at 5:56am PST

The Mississippi River is already creeping up the sandbags laid out to protect the town of Alton, Illinois, which lies across the river from West Alton, Missouri.

Downstream, in Illinois, a prison has been partially evacuated. Menard Correctional Center is on the banks of the Mississippi, and the staff anticipates minor flooding in some of its cells when the river crests.

The situation is also looking desperate in Missouri's Ozarks, according to the mayor of Rockaway Beach

"It is devastating," Don Smith said on CNN. "We are begging for help."

There are trucks in town that are completely underwater and businesses on the shore of a lake are in danger, he said. "I don't even know how we're going to deal with the cleanup process," he said. "There are condo units that are completely underwater."

Evacuations have been going smoothly, he said. But he was very concerned the flooding will get worse and the town doesn't have the capacity to protect itself.

In Louisiana, the governor declared a state of emergency in advance of floodwaters coming later in the week.

Nearly 50 killed

Photos: Dallas-area tornadoes Photos: Dallas-area tornadoes Josh White gets emotional as he recounts how he lived through the tornado that hit Garland, Texas, on Saturday, December 28. The National Weather Service confirmed that three tornadoes were part of storms that ripped through the Dallas area, killing 11 people and damaging hundreds of buildings. Hide Caption 1 of 12 Photos: Dallas-area tornadoes An emergency vehicle drives through a neighborhood in Rowlett, Texas, on Sunday, December 27. Crews were scouring debris for victims and assessing damage. Hide Caption 2 of 12 Photos: Dallas-area tornadoes Bob Moore walks through his home in Rowlett the morning after it was hit by a tornado. Hide Caption 3 of 12 Photos: Dallas-area tornadoes A Christmas tree lies in the wreckage of a family's home in Rowlett on December 27. Hide Caption 4 of 12 Photos: Dallas-area tornadoes A bus is overturned in Garland on December 27. Hide Caption 5 of 12 Photos: Dallas-area tornadoes Debris is scattered around a driveway in Rowlett on December 27. Hide Caption 6 of 12 Photos: Dallas-area tornadoes Tornado damage is seen in a neighborhood in Garland on December 27. Hide Caption 7 of 12 Photos: Dallas-area tornadoes A Rowlett home is heavily damaged. Hide Caption 8 of 12 Photos: Dallas-area tornadoes This apartment building in Garland was damaged as well. Hide Caption 9 of 12 Photos: Dallas-area tornadoes Michael Downard stands outside his house in Rowlett the morning after it was struck by a tornado. Hide Caption 10 of 12 Photos: Dallas-area tornadoes Damage is seen in a Garland neighborhood on December 27. Hide Caption 11 of 12 Photos: Dallas-area tornadoes A flipped vehicle is seen in Rowlett. Hide Caption 12 of 12

Storms have been blamed for roughly 49 deaths this past week across the country. In Missouri, the death toll rose to 14 on Wednesday with the recovery of the body of a motorist whose vehicle was swept off a road in Crawford County. Eleven people died in the Dallas area, five in southern Illinois, five in Oklahoma and at least one in Georgia.

Tornadoes are being blamed for most of the deaths in Texas.

But many of the rest died after their cars were swept away by floodwater, like five international soldiers temporarily stationed in Missouri for training.

Witnesses say they drove onto a flooded road and rushing water carried them away.

Close calls

JUST WATCHED Four soldiers killed in Missouri flooding Replay More Videos ... MUST WATCH Four soldiers killed in Missouri flooding 00:53

Others came close to suffering the same fate.

In Jefferson County, south of St. Louis, rescuers pulled a man from his car stuck in floodwaters, CNN affiliate KMOV reported. He said he had not seen the water, because it was dark.

In the same county, Shelia Seaman helped a friend move his things out of the way of rising water. Then they returned to get his dog. "It was too late," she told KMOV . "We couldn't get back across the water."

The friend took a boat to try to rescue the dog, but rushing water washed the boat away. The friend survived and Seaman was able to get in touch with him. There was no word on what happened to the dog.

Blame it on El Nino

At least 69 tornadoes have touched down in the United States in just the past week, said CNN meteorologist Pedram Javaheri.

"Typically, you see about 24 for the entire month of December," he said.

But flooding causes many more deaths in the United States than tornadoes do. And there have already been about 400 reports of rivers flooding in the country.

In some places, the rainfall hasn't stopped for weeks. Portland, Oregon, and Seattle have been drenched with rain every day in December, Javaheri said.

JUST WATCHED El Niño to blame for wild weather around the world Replay More Videos ... MUST WATCH El Niño to blame for wild weather around the world 01:26

Blame it on El Nino, a warming of the eastern Pacific Ocean, mainly along the equator.

El Ninos occur every two to seven years in varying intensity, and the waters of the eastern Pacific can be up to 4 degrees Celsius (7 degrees Fahrenheit) warmer than usual.

The phenomenon can cause more frequent and intense storms, as well as massive economic damage, as the major El Nino in 1997-1998 did.

The damage worldwide from that El Nino was estimated at $30 billion to $45 billion, Javaheri said.