Environment

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The construction site at Interstate 15 was engulfed in flames on Monday, May 5, 2014, in Hesperia, Calif. The California Highway Patrol's Carlos Juarez says the bridge at Ranchero Road caught fire at about 1:30 p.m. and Interstate 15 was closed soon after because of falling debris. (AP Photo/The Victor Valley Daily Press, David Pardo)

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The construction site of the Ranchero Interchange Bridge at Interstate 15 was engulfed in flames on Monday, May 5, 2014, in Hesperia, Calif. The California Highway Patrol's Carlos Juarez says the bridge at Ranchero Road caught fire at about 1:30 p.m. and Interstate 15 was closed soon after because of falling debris. (AP Photo/The Victor Valley Daily Press, David Pardo)

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The construction site at Interstate 15 was engulfed in flames on Monday, May 5, 2014, in Hesperia, Calif. The California Highway Patrol's Carlos Juarez says the bridge at Ranchero Road caught fire at about 1:30 p.m. and Interstate 15 was closed soon after because of falling debris. (AP Photo/The Victor Valley Daily Press, David Pardo)

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California Highway Patrol diverts traffic off of Interstate 15 where a construction site was engulfed in flames on Monday, May 5, 2014, in Hesperia, Calif. The California Highway Patrol's Carlos Juarez says the bridge at Ranchero Road caught fire at about 1:30 p.m. and Interstate 15 was closed soon after because of falling debris. (AP Photo/The Victor Valley Daily Press, David Pardo)

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Cattle graze as smoke from the main wildfire looms in the distance on Monday, May 5, 2014, in Guthrie, Okla. Firefighters worked Monday to battle a large wildfire in central Oklahoma that destroyed at least six homes and left at least one person dead after a controlled burn spread out of control. (AP Photo/Nick Oxford)

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Smoke from the main wildfire looms over an evacuated trailer home on Monday, May 5, 2014, in Guthrie, Okla. Oklahoma residents returned to the charred remains of their homes Monday as firefighters battled a stubborn blaze that began after a controlled burn a day earlier went awry and swept through the parched countryside with wind gusts at 31 mph. (AP Photo/Nick Oxford)

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A firefighter monitors 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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A wildfire burns through a grove of Red Cedar trees as firefighters continued to work on containing the blaze on Monday, May 5, 2014, in Guthrie, Okla. Firefighters worked Monday to battle a large wildfire in central Oklahoma that destroyed at least six homes and left at least one person dead after a controlled burn spread out of control. (AP Photo/Nick Oxford)