The National Weather Service says there are multiple spots of potential failures along that levee between Portage Des Sioux and West Alton.
The rivers appear to have crested.
Warning sirens blared in West Alton Monday night as 590 residents were advised to evacuate because of a levee breach in northeastern St. Charles County.
More than $73 million in federal aid has been approved so far to help Illinois communities hurt by April’s floods.
According to HomeInsurance.com, Missouri homeowners pay over $300 more each year than residents of Illinois and Iowa but $400 less than Oklahoma residents.
Forecasts call for the river to crest Tuesday at 34.5 feet, nearly four feet higher than April’s crest, but lower than earlier predictions.
The United States Coast Guard has restricted traffic on an upper potion of the Mississippi River just north of the St. Louis Harbor, Monday.
Lindbergh remains closed from Natural Bridge to Missouri Bottom Road.
Mississippi River to crest in Grafton Monday, Alton Tuesday.
Roads in Calhoun, Greene, Jersey, Madison, and Randolph Counties affected.