The Quad Cities received about an inch of rain on Sunday as the river rose to 21.5 feet, more than a foot shy of the record 22.6-foot crest during the Great Flood of 1993.
The Mississippi was expected to reach 22.5 feet Tuesday. Forecasts called for a 30 percent chance of more showers or thunderstorms, but the National Weather Service said any additional precipitation would not affect the crest expected to last 36 hours.
There was concern that high winds could worsen minor flooding.
"There was light rain last night. It really shouldn't affect the river level," said National Weather Service meteorologist Rick Arkell. "This crest has turned out to be really a 90 percent snow-melt crest …"
Davenport is the only major city on the upper Mississippi that does not have a permanent floodwall or levee on its scenic riverfront. Pressure from the river buckled pavement, allowing water to seep into John O'Donald Stadium, home of the Quad City River Bandits minor-league baseball team.
Water covered the outfield, submerged railroad tracks and caused minor flooding damage to some businesses. Crews were using pumps day and night to try to keep downtown dry.
Gov. George Vilsack toured the region by air Sunday and promised to ask for federal disaster aid.
Across the river in Moline, Ill., minor flooding occurred near the state Highway 150 bridge as water backed up from the Mississippi, sending the Rock River to flood stage of 12 feet.
"In contrast to 1993, the good news is the tributaries are really helping us," NWS hydrologist Jeff Zogg said.
Illinois Gov. George Ryan visited floodgates in East Dubuque and sandbag levees in Savanna and Hampton Saturday before declaring eight Illinois counties disaster areas, making state resources available to flood fighters. Ryan called out 250 National Guard troops to help residents.
About 114 prisoners from the East Moline Correctional facility and Clayton Work Camp filled sandbags. State transportation department officials had prepositioned 692,000 sandbags on the Illinois side of the river for flood defenses.
The Ameritech Foundation donated $25,000 to the Red Cross for flood relief support efforts in western Illinois. The Red Cross is providing emergency shelter to displaced families and serving meals to volunteers on the levees.
The agency has prepared 1,500 cleanup kits for people whose homes are damaged by flooding.
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