Hospital patients in wheelchairs and on stretchers were evacuated in the middle of the night as the biggest flood in Cedar Rapids, Iowa has covered more than 400 blocks Friday and largely cut the supply of clean drinking water in the city of about 120,000. The Cedar River has currently driven 10,000 people away from their homes. The Iowa capital, Des Moines, is also having problems as the Des Moines River is threatening to spill over the levees. Persons living in low-lying areas were told to get out on Friday evening. Meanwhile the heavy rainfall has also severely damaged the corn crop in America's largest corn state and other parts of the Midwest at a time when corn prices are soaring. It is too early for accurate estimates of the damage but it could soar into the billions.