Visible results of flash floods that swamped natural gas and oil well pads and in some cases dislodged storage tanks in Weld County, Colorado, on September 17, 2013. Hundreds of natural gas and oil wells along with pipelines were shut down by the flooding, as state and federal inspectors gauge the damage and look for contamination from inundated oil fields. #

The sun sets over a flooded field near Crook, Colorado, on September 17, 2013. The emergency airlifts of flood victims waned Tuesday, leaving rescue crews to systematically search the nooks and crannies of the northern Colorado foothills and transportation officials to gauge what it will take to rebuild the wasted landscape. #

An area damaged by flooding in northern Colorado on September 14, 2013. Colorado and Wyoming National Guard units were activated to provide assistance to people affected by massive flooding along Colorado's Front Range. #

Chief Warrant Officer Troy Parmley, a pilot with the Delta Company, 3rd Battalion, Colorado Army National Guard, looks at floodwaters from recent rainfall while flying a UH-72 Lakota helicopter during relief and recovery operations near Fort Collins, Colorado, on September 18, 2013. Colorado Guard members have evacuated about 700 people by ground, with military aerial evacuations currently totaling 2,394. #

A view of a residential area destroyed by heavy rains, with some areas receiving as much as 18 inches in a 24-hour period in Boulder, Colorado, on September 14, 2013. #

Robert Pandolfi of Longmont, Colorado uses a shovel to direct water in the basement of his boss' home as residents clean up in the wake of a week of heavy flooding on September 16, 2013 in Longmont, Colorado. #

Tyra Thorstad of Seattle, Washington helps family clean up in an especially hard hit neighborhood in Longmont, Colorado as residents clean up on September 16, 2013 in Longmont, Colorado. #

Residents cleanup from historic floods in Longmont, Colorado, on September 16, 2013. Monday's clearing skies and receding waters revealed only more heartbreak: toppled houses, upended vehicles and a stinking layer of muck covering everything. #

Homeowner Chris Ringdahl, right, is comforted by family friend Hillari Hansen, in front of her possessions as they clean up from the floodwaters in Longmont, Colorado, on September 16, 2013. #

A U.S. Army UH-60 Black Hawk helicopter assigned to the Colorado Army National Guard lands to evacuate a resident stranded on a highway damaged by flooding in northern Colorado, on September 14, 2013. #

A rescue helicopter flies over Lyons, Colorado which was hard hit by flood waters, on September 17, 2013. Colorado authorities coping with the aftermath of last week's deadly downpours stepped up the search for victims left stranded in the foothills of the Rockies and evacuations of prairie towns in danger of being swamped as the flood crest moved downstream. #

Staff Sergeant Jose Pantoja, with the 2-4 GSAB 4th Infantry Division based in Ft. Carson, waves to people in Left Hand Canyon after they indicated their condition and that they didn't need help from a Black Hawk helicopter near Jamestown, Colorado, on September 17, 2013. #

U.S. Army Staff Sgt. Jose Pantoja, a flight medic with Charlie Company, 2nd General Support Aviation Battalion, carries Mike Daniels, an evacuee, up a hoist onto a UH-60 Black Hawk helicopter during a flood rescue and recovery operations in Boulder, Colorado, on September 16, 2013. #

U.S. Army Sgt. 1st Class Keith Bart, a UH-60 Black Hawk helicopter crew chief with Charlie Company, 2nd General Support Aviation Battalion, carries an animal to safety during flood rescue and recovery operations in Boulder, Colorado, on September 16, 2013. #

Katie Byrne, left, her neighbor Elizabeth Dipert, center, and church volunteer Linda Pekarek, right, sift through thrown out rotting flood refuse, looking for valuables, at Byrne's home in Longmont, Colorado, on September 18, 2013. #

A debris-covered hunting boot sits in front of a home in Longmont, Colorado, drying as residents clean up in in one of the hardest hit neighborhoods in the wake of a week of heavy flooding, on September 16, 2013. #

Chad Obrien comforts his four year old son Elijah, as he works to remove waterlogged and contaminated floors and walls from his flooded basement, which was wrecked in recent flooding, in Longmont, Colorado, on September 18, 2013. #