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SPRINGFIELD, Ill. — Governor J.B. Pritzker has deployed another 200 National Guard troops to southern Illinois to monitor rising water in the region.

The additional troops bring to 400 the number patrolling the region threatened by the rising Mississippi and Illinois rivers.

Towns in the metro-east area are battling flood waters, with the Mississippi at Alton expected to crest at 39 feet and the Illinois cresting at Grafton at 35.5 feet. Those levels would be second only to those reached in the great 1993 flood.

According to the governor’s office, state agencies have provided more than three million sandbags, more than 2,700 rolls of plastic, 27 pumps and five dozen Department of Corrections detainees to help hold back rising rivers.

Emergency Management officials are advising residents in river communities to have an evacuation-plan in place in case they have to leave.