America's recent storms are causing historic flooding in Missouri

The effects of this weekend's storms are still being felt across the country, but particularly residents in Missouri along the Mississippi.

Rain-swollen rivers across Missouri were still rising on Wednesday, with widespread flooding forcing the evacuation of hundreds of people, closing part of a major interstate highway and threatening to wash out scores of structures.

At least 13 people have died in Missouri since the weekend, when days of downpours from a massive winter storm system triggered the worst flooding in two decades, Governor Jay Nixon said. For the most part, those deaths have been caused by people driving into the water.

"It's very clear that Missouri is in the midst of a very historic and dangerous flooding event," Nixon said during a Tuesday news conference. The New York Times reports the water is rising so fast, it's set to break the record set by the great Midwest flood of 1993. The massive storm system that's been moving across the country led to blizzards, tornadoes, and flooding across the southwest and southern US before heading north across the Midwest.

Several major rivers and tributaries in Missouri and Illinois were poised to crest at record levels, the National Weather Service said. Some of the rivers would continue to rise until Saturday.

Here's what the damage looked like as of Tuesday.

At the confluence of the Mississippi and Missouri rivers, about 20 miles (32 km) north of St. Louis, residents of the towns West Alton and Arnold were told to evacuate on Tuesday.

Flooding in the middle portion of the Mississippi River and its tributaries may reach the highest levels in recorded history, the forecasting site AccuWeather said.

The U.S. Coast Guard closed a five-mile (8 km) stretch of the Mississippi River near St. Louis to all vessel traffic due to hazardous conditions.

The National Weather Service forecast the Mississippi River at the Chester, Illinois, river gauge about 60 miles (100 km) south of St. Louis would crest at 49.7 feet (15.1 meters) on Friday - matching the 1993 record.

The floodwaters have forced the closures of roadways and highways, including a portion of Interstate 44, a major highway that runs from west Texas to St. Louis, the Missouri Department of Transportation said on Wednesday.

Sewage has been flowing into the fast-rising Meramec River near St. Louis since Monday, when floodwater disabled a sewer treatment plant, the St. Louis Post-Dispatch reported.

In Illinois, some inmates were moved out of the Menard Correctional Center, a maximum security prison on the banks of the Mississippi River, and sandbags and drinking water were prepared in anticipation of flooding in lower level cell blocks, Illinois officials said in a statement.

Governor Bruce Rauner on Tuesday issued a state disaster proclamation for seven counties to help with response and recovery.

Nixon called out the National Guard to direct traffic away from closed roads in his state and urged people not to drive in flooded areas. Most deaths in flooding occur when cars are swept away.

The destructive flooding will close out a month of weird weather in the US influenced by the record-breaking El Niño weather pattern this year.

(Reuters reporting by Victoria Cavaliere in Los Angeles)