PRINCETON, IN - JULY 17: Drought-damaged corn grows in a field on July 17, 2012 near Princeton, Indiana. The corn and soybean belt in the middle of the nation is experiencing one of the worst droughts in more than five decades. Indiana was the nation\'s fourth largest corn producer in 2011. (Photo by Scott Olson/Getty Images) (credit:Getty)
2012年7月中西部の干害。とうもろこしが立ち枯れている。インディアナ州で撮影。(02 of07)
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FRITCHTON, IN - JULY 17: Corn plants dry in a drought-stricken farm field on July 17, 2012 near Fritchton, Indiana. The corn and soybean belt in the middle of the nation is experiencing one of the worst droughts in more than five decades. Indiana was the nation\'s fourth largest corn producer in 2011. (Photo by Scott Olson/Getty Images) (credit:Getty)
WYATT, MO - JULY 18: A buoy used to help guide barges rests on the bank after the water level dropped on the Mississippi River July 18, 2012 near Wyatt, Missouri. Some barge operators have lightened their loads or stopped running altogether on the lower Mississippi because of low water levels. (Photo by Scott Olson/Getty Images) (credit:Getty)
2012年8月、牧草が枯れ、放牧ができなくなった牧場。インディアナ州で撮影。(04 of07)
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CUBA, IL - AUGUST 03: Grass, dried from heat and drought, struggles to survive in a cattle pasture August 3, 2012 near Cuba, Illinois. Cattle being raised in the pasture used to be self-sustaining. This summer\'s drought has forced the farmer to truck in water, after the pond dried up, and extra feed, to supplement the dry grass, from another farm nearly 20 miles away. Farmers in the Midwest and elsewhere continue to struggle after than half the counties in the United States have been designated disaster areas, mostly due to drought conditions throughout the Midwest. (Photo by Scott Olson/Getty Images) (credit:Getty)
2012年8月、枯れたとうもろこし。インディアナ州で撮影。(05 of07)
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NEW HARMONY, IN - AUGUST 03: Corn dead from drought sits in a field August 4, 2012 near New Harmony, Indiana. More than half of the counties in the United States have been designated disaster areas, mostly due to drought conditions throughout the Midwest. (Photo by Scott Olson/Getty Images) (credit:Getty)
2012年7月、イリノイ州で撮影。(06 of07)
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OLMSTED, IL - JULY 26: A corn plant grows in a field parched by drought on July 26, 2012 near Olmsted, Illinois. The field, farmed by Kevin Ulrich, was one of several in the drought stricken region of Southern Illinois that were visited by officials from the United States Department of Agriculture\'s (USDA) Farm and Foreign Agriculture Services (FFAS) department and Farm Service Agency (FSA). Seventy percent of Illinois, the nation\'s number two corn producing state, is classified as experiencing some level of drought.(Photo by Scott Olson/Getty Images) (credit:Getty)
CUBA, IL - AUGUST 03: Cattle nibble the remains of grass in a pasture heavily damaged by drought August 3, 2012 near Cuba, Illinois. Farmers in the Midwest and elsewhere continue to struggle after than half the counties in the United States have been designated disaster areas, mostly due to drought conditions throughout the Midwest. (Photo by Scott Olson/Getty Images) (credit:Getty)