At least 6 dead in Colorado flooding, as receding waters reveal devastation, danger

Longmont, Colo., flood cleanup (Fox News)

Longmont, Colo., flood cleanup (Fox News)

Longmont, Colo., flood cleanup (Fox News)

Sept. 17, 2013: A home is destroyed in Salina in the Fourmile Canyon area of Boulder County Colorado. (AP/Daily Camera)

Sept. 17, 2013: An abandoned car lies in the mud off a road destroyed by flood waters along the South Platte River east of Greeley, Colo.

Sept. 17, 2013: Keenan Gates walks across a makeshift bridge in Salina after assessing the damage to his mothers home at the Salina Junction in the Fourmile Canyon area of Boulder County Colorado. (AP/Daily Camera)

Sept. 17, 2013: Flood damage in Salina in the Fourmile Canyon area of Boulder County Colorado. (AP/Daily Camera)

A home leans into flood waters that have destroyed a section of U.S. Highway 34, top, near Greeley, Colo., Tuesday, Sept. 17, 2013. The surrounding area was especially affected by recent flooding, with more than 400 lane-miles of state highway and more than 30 bridges destroyed or impassable. (AP Photo/John Wark) (AP)

A highway, submerged and broken, winds through a flooded plain near the South Platte River, east of Greeley, Colo., Tuesday, Sept. 17, 2013. Since last week's devastating floods, state and local transportation officials are tallying the washed-out roads, collapsed bridges and twisted railroad lines. The rebuilding effort will cost hundreds of millions of dollars and take months, if not years. (AP Photo/John Wark) (AP)

A farm is surrounded by floodwaters near Crook, Colo., on Tuesday, Sept. 17, 2013. The floods that ravaged Colorado this past week also took a toll on the state's agricultural communities.. (AP Photo/Chris Schneider) (AP)

Sept. 17, 2013: Trenton Mays, 15, gathers belongings from his uncle's flooded trailer in Evans, Colo. (AP)

Sept. 17, 2013: In this aerial photo, vehicles sit amongst the rubble in Lyons, Colo. which was hard hit by flooding in recent days, as seen from a rescue helicopter flown by the 2-4 GSAB 4th Infantry Division based in Ft. Carson. (AP/Pool Daily Camera)

Sept. 16, 2013: The South Platte River stretches into neighboring fields and roads southwest of Greeley, Colo. (AP/The Greeley Tribune)

FILE - In this Sept. 13, 2013 file photo, cattle find dry ground near Fort Collins, Colo., as flooding continues to devastate the Front Range and thousands are forced to evacuate with an unconfirmed number of structures destroyed. The floods that ravaged Colorado this past week also took a toll on the state's agricultural communities. (AP Photo/Colorado Heli-Ops, Dennis Pierce) MANDATORY CREDIT (AP/Colorado Heli-Ops)

Sept. 15, 2013: Robert Frawley, of Burggraf Disaster Restoration, carries destroyed belongings out of a flooded home on Iris Avenue in Boulder, Colo. (AP/Daily Camera)

Sept. 15, 2013: Dan Feldheim, left, Scott Hoffenberg, center, and John Smart, pass sandbags as residents reinforce the dam on University Hill in Boulder, Colo. The National Weather Service says up to 2 inches of rain could fall Sunday, creating a risk of more flooding and mudslides. (AP/The Daily Camera)

Sept. 15, 2013: Carlos Duron, 3, and his mother, Vilma Maldonado, are evacuees from Longmont, Colo., staying at Mead High School with the Red Cross in Mead, Colo. (AP/Daily Camera)

Saturday, Sept. 14: A car lies on its side in a mud slide on Olde Stage Road in Boulder, Colo. Rescuers rushed by land and by air Saturday to evacuate Coloradoans stranded by epic mountain flooding as debris-filled rivers became muddy seas that extended into towns and farms miles from the Rockies. (AP/Daily Camera)

Sept. 14, 2013: Brian Montgomery works to clean up the mud in his mothers flooded basement on Olde Stage Road in Boulder, Colo,. (AP/Daily Camera)

Sept. 14, 2013: Eric Machmuller, front left, and Pat Machmuller, rear left, lead a boat down a residential street to help residents gather pets and belongings from their flooded homes in Longmont, Colo. (AP)