Midwest floodwaters wash levees, weather improves

Thunderstorms this week that had added to a month-long deluge let up and drier, cooler weather was forecast for saturated areas of Iowa, Missouri and Illinois where thousands of residents have been evacuated and hundreds of thousands of acres of prime farmland swamped.

In Winfield, Missouri, a levee break on Friday sent a rush of muddy water across 3,000 acres of surrounding fields and prompted frantic efforts to hold back more water from the town of about 800 people north of St. Louis.

But those efforts failed shortly before dawn on Saturday as the river pushed through a six-foot- (1.8-metre-)high barrier of sandbags that stretched 2,000 feet along the community's eastern edge.

"The water won," said Lincoln County emergency management spokesman Andy Binder.

The water was rising rapidly on Saturday through the area of about 100 homes, playgrounds and ballparks.

"It just came in under the barrier and then blew through it," said Winfield Mayor Harry Stonebraker. "It's terrible ... what the Mississippi can do."

The Midwest storms and torrential rains have killed at least 24 people since late May. More than 38,000 people have been driven from their homes, mostly in Iowa where 83 of 99 counties have been declared disaster areas.

Fears that as many as 5 million acres of corn and soybeans have been lost to flooding in the world's largest grain and food exporter pushed corn and livestock prices to record highs in the last week.

Corn prices at the Chicago Board of Trade on Friday traded at a record $8.25 per bushel, more than double the 40-year average. Stockpiles of corn in the United States -- which normally ships more than half of all world corn exports -- had already been projected at 13-year lows next year.

So the effect on global food prices as U.S. prices soar has alarmed everyone from central bankers to food aid groups.

U.S. Army Corps of Engineers St. Louis District spokesman Alan Dooley said the strained situation with flood barriers on the river looked less dire downstream around St. Louis, where more sophisticated levee systems were in place.

"We have a high level of confidence ... that they will be well able to fend this off," Dooley said. "Downriver, you're looking at the crest still to arrive."

The Corps was forecasting that the river would crest again at St Louis on Monday at 38.7 feet, compared to the record 49.9 feet in the last major flood in 1993. At Cape Girardeau, 100 miles south of St Louis, the crest was expected on July 2 at 43 feet, compared to the record of 47.9 feet in 1993.

Dooley said those crests looked manageable with existing levees and flood control systems, but he added: "If we don't have any more rain."

The National Weather Service on Saturday said scattered thunderstorms were possible in a few parts of the southern and eastern Midwest through the weekend, but the areas worst-hit by torrential rains and floods this month looked to be dry.