From Yahoo! News:
A powerful derecho storm that swept through the Midwest on Monday has left thousands of acres of crops completely devastated, and officials say more than half a million people could be without power for quite a while.
Iowa Gov. Kim Reynolds (R) said the storm, which had hurricane-force winds up to 112 mph, destroyed at least one-third of the entire state’s crops. More than 10 million acres were completely flattened, leading Reynolds to say she thinks the storm should qualify for federal disaster declaration. The Washington Post reports between 180 and 270 million bushels of corn were likely damaged, shortly before harvesting usually begins in September.