At Clarksville, Mo., north of St. Louis, the river crested at Monday at a near-record 35.3 feet, less than expected, but the level could rise with predicted rain of one to two additional inches, the National Weather Service said.
The Mississippi River is not expected to fall below flood stage in St. Louis until next week, the St. Louis Post-Dispatch reported, noting the river is expected to crest there Tuesday at 35.1 feet, five feet above flood stage.
At least six rivers in Illinois are at record levels after days of rain. Flooding displaced thousands of people, and Gov. Pat Quinn declared 44 Illinois counties disaster areas, CNN reported.
Missouri Gov. Jay Nixon declared a state of emergency in his state, CNN said.
Additional rain through Tuesday night, is expected to bring up to two more inches to southern Michigan, southern Illinois and all of Indiana, accuweather.com said.