John Schulz , Public Information Officer of the Larimer County Sheriff’s office in Colorado, said a series of dams overflowed and one broke overnight, killing one, and threatening hundreds more.
Heavy rains that sent walls of water crashing down mountainsides had forced the University of Colorado to cancel classes.
Boulder County was hit hardest, with up to 6 inches of rain falling over 12 hours. But flooding was reported all along the Front Range, from Colorado Springs to north of Fort Collins.
“Move to higher ground now. Act quickly to protect your life,” the Weather Service warned throughout the morning.
Mudslides and rockslides were reported in several areas, with parts of U.S. 6, Boulder Canyon, Colorado 14 and U.S. 287 all reporting problems and temporary blockages during the evening Lefthand Canyon was reported blocked by one of the many slides.