Environment

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A firefighter works to extinguish a flare up on Monday, May 5, 2014, in Guthrie, Okla. Gov. Mary Fallin has declared a state emergency across Oklahoma after several wildfires broke out across the state, including a blaze north of Oklahoma City that destroyed at least a half dozen homes and left one man dead. (AP Photo/Nick Oxford)

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Firefighters work to extinguish a flare up on Monday, May 5, 2014, in Guthrie, Okla. Gov. Mary Fallin has declared a state emergency across Oklahoma after several wildfires broke out across the state, including a blaze north of Oklahoma City that destroyed at least a half dozen homes and left one man dead. (AP Photo/Nick Oxford)

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Greg Broadbent plants corn in a field, Monday, May 5, 2014, near De Soto, Iowa. Despite getting a late start to planting, farmers are optimistic they’ll get their crops planted during the optimum period. Due to rain and cold, it will just be toward the mid to later part of that period. (AP Photo/Charlie Neibergall)

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Greg Broadbent plants corn in a field, Monday, May 5, 2014, near De Soto, Iowa. Despite getting a late start to planting, farmers are optimistic they’ll get their crops planted during the optimum period. Due to rain and cold, it will just be toward the mid to later part of that period. (AP Photo/Charlie Neibergall)

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Greg Broadbent climbs into the cab of a tractor before planting corn in a field, Monday, May 5, 2014, near De Soto, Iowa. Despite getting a late start to planting, farmers are optimistic they’ll get their crops planted during the optimum period. Due to rain and cold, it will just be toward the mid to later part of that period. (AP Photo/Charlie Neibergall)

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Greg Broadbent plants corn in a field, Monday, May 5, 2014, near De Soto, Iowa. Despite getting a late start to planting, farmers are optimistic they’ll get their crops planted during the optimum period. Due to rain and cold, it will just be toward the mid to later part of that period. (AP Photo/Charlie Neibergall)

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A farmer works in a field, Monday, May 5, 2014, near De Soto, Iowa. Despite getting a late start to planting, farmers are optimistic they’ll get their crops planted during the optimum period. Due to rain and cold, it will just be toward the mid to later part of that period. (AP Photo/Charlie Neibergall)

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Greg Broadbent plants corn in a field, Monday, May 5, 2014, near De Soto, Iowa. Despite getting a late start to planting, farmers are optimistic they’ll get their crops planted during the optimum period. Due to rain and cold, it will just be toward the mid to later part of that period. (AP Photo/Charlie Neibergall)