LARIMER COUNTY, Co. (AP) - Days of heavy rain and flooding are taking their toll on Northern Colorado, and officials say nearly a thousand people could be stranded.
Six people are believed to be dead in the region.
Thousands of homes are damaged or destroyed, and thousands of roads are impassable, making rescue efforts difficult.
Larimer County officials say people are stranded.
Nick Christensen of the Larimer County Sheriff's Office says, "At this point, our understanding is there's about a thousand residents that are up in the various isolated areas in need of evacuation, so that will be the priority when air is available, hopefully here soon."
Rescuers hope to resume air rescues Monday, but forecasts predict spotty rainstorms could keep helicopters grounded.
Authorities are urging people who are stranded to wave bright cloths, flash mirrors or set off flares to get the attention of passing aircraft.