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ST. LOUIS   •   Rivers swollen from recent storms have flooded parts of the region but are expected to crest today and Tuesday, authorities say.

The Mississippi River that has flooded streets in Alton will crest there Tuesday when it reaches 34.5 feet, said Ben Miller of the National Weather Service in Weldon Spring. Flood stage is 21 feet. Flooding has closed the Argosy Casino.

The river will crest today in Grafton at about 30.5 feet, he said. That's more than 12 feet above flood stage.

Authorities have closed several roads around the area including Route 3 in Grafton as well as the Great River Road from Highway 67 in Alton to Route 3 in Grafton.

The National Weather Service's flood warning includes several river towns in Missouri and Illinois including Quincy, Hannibal, Louisiana, Clarksville and Winfield.

The river had risen to about 10 feet above flood stage in downtown St. Louis but isn't expected to cause major problems, Miller said. The Meramec River is flooding parts of Arnold and is expected to crest Tuesday at about 38.5 feet.

More than 36,000 customers in Missouri were without power Monday morning since Friday night's thunderstorms and tornadoes that swept through the area. About 1,000 customers in Illinois were without electricity.

The forecast does not call for rain until Wednesday. Meteorologists say there is a 50 percent chance of rain Wednesday afternoon with high temperatures approaching 80 degrees.

Joel Currier is a reporter for the St. Louis Post-Dispatch. Follow him on Twitter here: @joelcurrier.