Nebraska officials are warning that flooding is possible next week along the South Platte River because of the heavy rain that has fallen in Colorado.
Central Nebraska forecasters are concerned because much of the area experiencing flooding in Colorado now feeds into the South Platte River basin. The National Weather Service predicts the South Platte will approach flood stage near Roscoe around the middle of next week.
National Weather Service forecaster Matt Masek says it doesn't look like the river will flood at this point, but that could change if more rain falls in the basin. Masek says the forecast will become more clear early next week.
National Guard troops have resumed truck convoys to rescue people stranded by floodwater in the cut-off Colorado community of Lyons. An estimated 2,500 residents are being evacuated in an operation that began on Friday. Helicopters are being used to airlift 295 residents of another isolated town, Jamestown.
The National Guard has also been airdropping food, water and other supplies to people stranded in narrow canyons in the Rocky Mountain foothills. Evacuations are voluntary, but those who choose to stay with their homes could face weeks without power, water, sewer or cellphone service.
Days of heavy rain sent water rushing from the mountains into communities below, inundating farms and destroying roads and bridges, turning neighborhoods and towns into islands. The flooding affects parts of a 4,500-square-mile area, almost the size of Connecticut.
At least four deaths have been blamed on the flooding. Officials in hard-hit Boulder County say more than 170 people are unaccounted for. But they say that just means they haven't been heard from, not that they're actually missing.