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Matt Gillis, Deseret News
Volunteers from Sandy Midvalley Stake and Emergency Services sand bag and pump out water from a river flooding Canyon Creek assisted living home in Sandy, Utah, Sunday, June 6, 2010.

COTTONWOOD HEIGHTS — Several east-bench areas were put on alert Saturday evening as rivers threatened to breach their banks with excess snowmelt and groundwater runoff, as temperatures during the day reached into the 80s.

Unified Fire Authority Capt. Clint Smith said crews had been working in the town of Alta most of the day Saturday after reports of mudslides and riverbank flooding came in.

"The river is full," he said. "Those late storms put significant amounts of snow in the higher elevations, and going from cooler temperatures to today's 80s and 90s in the valleys has made it all come down."

Residents and officials were filling sandbags at Murray Park into the night in case waters overflow the various canyon creeks and river beds, according to police dispatchers.

Nearly two feet of water stood in the parking lot at the Canyon Creek Senior Living center in Midvale, and local volunteers gathered to stave off intensified flooding within the facility.

Officials cautioned homeowners to keep an eye on the water levels in areas around their homes and neighborhoods and to be prepared if flooding should occur.

— Wendy Leonard