Des Moines Register: The number of crop acres that Iowa farmers are unable to harvest after the devastating August derecho has grown to 850,000, a new U.S. Department of Agriculture report showed Friday. That’s a more than 50% increase from September, when the USDA had set the estimated loss to the Aug. 10 derecho at 550,000 acres. The damage was compounded by a drought. Iowa Agriculture Secretary Mike Naig said he expects the number of lost acres will climb even more as growers move deeper into the harvest.