BOULDER, Colo. — As rescuers broke through to flood-ravaged Colorado towns, they issued a stern warning Saturday to anyone thinking of staying behind: Leave now or be prepared to endure weeks without electricity, running water and basic supplies.

National Guard helicopters and truck convoys carried the admonition into paralyzed canyon communities where thousands of stranded residents were eager to escape the Rocky Mountain foothills. But not everybody was willing to go. Dozens of people in the isolated community of Jamestown wanted to stay to watch over their homes.

Authorities made clear that residents who chose not to leave might not get another chance for a while. Rescuers won't go back for people who insist on staying, Boulder County Sheriff Joe Pelle said.

"We're not trying to force anyone from their home. We're not trying to be forceful, but we're trying to be very factual and definitive about the consequences of their decision, and we hope that they will come down," Pelle said.

Special education teacher Brian Shultz, 38, was torn about leaving his Jamestown home.

"I was thinking about staying. I could have lasted at least a year. I have a lot of training in wilderness survival," he said, adding that he probably had enough beer to last the whole time.

As he sat outside a makeshift shelter at a high school, Shultz floated the idea of walking back into the funky mountain town.

"If we hike back, I would stay there and just live. I'd rather be at our own house than staying at some other people's houses," he said.

His wife, Meagan Harrington, gave him a wry smile. About 10 of their neighbors declined to evacuate, she said.

"They said they wouldn't force you, but it was strongly encouraged," she said.

Shultz teared up behind his sunglasses as he compared his situation to that of his neighbors.

"At least all of our stuff's there and will be there when we get back. The people right by the river, their houses were washed away. Other people thought their houses were going to be OK, and then they started to go. It's just really devastating."

Across the foothills, rescuers made progress against the floodwaters. But they were still unable to go up many narrow canyon roads that were either underwater or washed out.

On Saturday, the surge of water reached the plains east of the mountains, cutting off more communities and diverting some rescue operations.

Four people have been confirmed dead since the harrowing floods began Wednesday. And hundreds of others have not been heard from in the flood zone, which has grown to cover portions of an area nearly the size of Connecticut.

Some of those who are unaccounted for may be stranded or injured. Others might have gotten out but not yet contacted friends and relatives, officials said.

Police expected to find more bodies as the full scope of damage emerges.

A woman was missing and presumed dead after witnesses saw floodwaters from the Big Thompson River destroy her home in the Cedar Cove area, Larimer County sheriff's spokesman John Schulz said.

"I expect that we're going to continue to receive reports of confirmed missing and confirmed fatalities throughout the next several days," he said.

Two fatalities were identified by the Boulder County coroner Saturday as Wesley Quinlan and Wiyanna Nelson, both 19.

Authorities believe the couple died when they were swept away after driving into floodwaters and then leaving their vehicle. Their cause of death is under investigation.

The military put more troops on the ground and helicopters in the air to aid in the search-and-rescue effort.

By Saturday night, 1,750 people and 300 pets had been evacuated from Boulder and Larimer County, National Guard Lt. James Goff said.

The airlifts will continue Sunday with helicopter crews expanding their searches east to include Longmont, Fort Collins and Weld County.

It was not clear how many people were still stranded.

A helicopter taking Gov. John Hickenlooper on a tour of the flooded areas even got in the act, stopping twice to pick up six stranded people and their two pets. Terry Kishiyama's son flagged down a helicopter with his shirt after a three-day wait for rescue from a neighbor's house on higher ground.

"You could hear the choppers for miles and miles, but I didn't know if they were evacuating people. You see a chopper going down behind a ridge, and you have no clue," Kishiyama said.

In addition to his son's efforts, Kishiyama said his wife shouted at the chopper, "We have babies!"

More than 85 fifth-graders from Louisville were greeted by their parents and friends Saturday after they were rescued from an outdoor education center near Jamestown.

Above Larimer County, rescue crews airlifted 475 people to safety and planned to resume helicopter searches on Sunday, weather permitting.

Rain was expected to start up again in the mountains and foothills, with between a half-inch and 2 inches forecast to fall overnight, according to the National Weather Service.

Crews also used inflatable boats to pick up families and pets from farmhouses on Saturday. Some evacuees on horseback had to be escorted to safe ground.

Near Greeley, 35 miles east of the foothills, broad swaths of farmland had become lakes, and the raging South Platte and Poudre rivers surrounded more homes.

In one Boulder neighborhood, residents turned back city crews and machinery that arrived to remove the makeshift berms and sand-filled trash bags protecting their homes. University of Colorado students helped homeowners improvise a way to divert the rising water from Gregory Creek.

"The residents know better than anybody else how the water flows through the neighborhood," said Colleen Scanlan Lyons.

In communities where floodwaters began receding, homeowners had a chance to assess damage.

In Laporte, Wendy Clark surveyed soggy carpets and furniture that got damaged by the Poudre River.

"This mud smells disgusting," she said. "I don't know how long that's going to be around."

___

Associated Press writers P. Solomon Banda in Boulder and Mead Gruver in Laporte contributed to this report.

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  • Joe Biden

    Vice President Joe Biden, right, arrives with Gov. John Hickenlooper, center, in Greeley, Colo. after surveying the flood damage in the area and to meet with FEMA officials, Monday, Sept. 23, 2013. (AP Photo/The Denver Post, Kathryn Scott Osler, Pool)

  • Joe Biden

    Vice President Joe Biden, center, visits with American Red Cross workers Bobbie Anderson, from Texas, left, and Jason Godinez, from Evans, Colo., one of the areas hit hard by the flooding, Monday, Sept. 23, 2013, inside the Disaster Recovery Center in Greeley, Colo., after flying in a helicopter over areas ravaged by the recent flooding. (AP Photo/The Denver Post, Kathryn Scott Osler, Pool)

  • Joe Biden

    After flying in a helicopter over areas ravaged by the recent flooding, Vice President Joe Biden, center front, flanked by Colorado elected officials and FEMA workers, looks at maps of the areas that were hit, Monday, Sept. 23, 2013, in Greeley Colo. (AP Photo/The Denver Post, Kathryn Scott Osler, Pool)

  • Joe Biden

    A Blackhawk helicopter with Vice President Biden aboard inspects flood damage near Estes Park, Colo., Monday, Sept. 23, 2013. Biden toured areas of the state hit by flooding. (AP Photo/Ed Andrieski)

  • Colorado Flooding

    A section of highway is pictured near Boulder, Colo., on Monday, Sept. 23, 2013, during a tour of the area with Vice President Joe Biden. (AP Photo/Ed Andrieski)y

  • Joe Biden

    Vice President Joe Biden speaks during a briefing on the floods in Colorado at the FEMA Disaster Recovery Center in Greeley, Colo., Monday, Sept. 23, 2013. Biden took a helicopter tour of the flood damage in Colorado before meeting with officials at the center. (AP Photo/Ed Andrieski)

  • Joe Biden, Craig Fugate

    Vice President Joe Biden, right, talks with FEMA Administrator Craig Fugate after a briefing on the floods in Colorado at the FEMA Disaster Recovery Center in Greeley, Colo., Monday, Sept. 23, 2013. Biden took a helicopter tour of the flood damage in Colorado before meeting with officials at the center. AP Photo/Ed Andrieski)

  • Joseph Biden, John Hickenlooper

    Colo. Gov. John Hickenlooper, left, listens to Vice President Joseph Biden speak to members of the media at a FEMA Disaster Recovery Center, following a day in which Biden and others surveyed area flood damage by helicopter, in Greeley, Colo., Monday Sept. 23, 2013. More than 15,600 people have applied for FEMA aid so far in response to the flooding, with FEMA aid at $19.6 million and rising. (AP Photo/Brennan Linsley)

  • Joseph Biden, John Hickenlooper, Mike Coffmann

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  • Joseph Biden, John Hickenlooper, Michael Bennet

    Colo. Gov. John Hickenlooper, left, introduces Vice President Joseph Biden, second from right, who stands with Sen. Michael Bennet, D-Colo., far right, as Biden prepares to speak to members of the media at a FEMA Disaster Recovery Center following a day in which Biden and others surveyed area flood damage by helicopter, in Greeley, Colo., Monday Sept. 23, 2013. More than 15,600 people have applied for FEMA aid so far in response to the flooding, at $19.6 million and rising. (AP Photo/Brennan Linsley)

  • Joseph Biden, John Hickenlooper, Mike Coffman

    Vice President Joseph Biden waves after speaking to members of the media at a FEMA Disaster Recovery Center, joined by Colo. Gov. John Hickenlooper, second from left, and Rep. Mike Coffman, R-Colo., left, following a day in which Biden and others surveyed area flood damage by helicopter, in Greeley, Colo., Monday Sept. 23, 2013. More than 15,600 people having applied for FEMA aid so far in response to the flooding, with FEMA aid at $19.6 million and rising. (AP Photo/Brennan Linsley)

  • Joseph Biden, Cory Gardner

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  • Joseph Biden

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  • Joe Biden, John Hickenlooper

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  • Joe Biden

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  • Tara Anderson

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  • Jenna Brink

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  • Jenna Brink, Christine Brink

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  • People walk through a severely flooded neighborhood in Lyons, Colo., on Thursday, Sept. 19, 2013. Residents displaced by last week's flooding in the Colorado canyon town were allowed past National Guard roadblocks Thursday to find a scene of tangled power lines, downed utility poles, mud-caked homes and vehicles, and work crews furiously clearing debris and trying to restore power, water and sewer service. (AP Photo/Chris Schneider)

  • This photo shows a road that was washed out by the flood in Lyons, Colo., on Thursday, Sept. 19, 2013. The recovery process has begun all along the front range as people clean out flooded homes and businesses. Local governments are starting to clear debris and repair infrastructure.(AP Photo/Chris Schneider)

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  • Lisa Dunlap

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  • Shawna English, Sabrina Naftel

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  • Ron West

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  • Roslynn Regnery, Emma Birath

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  • This Sept. 17, 2013 photo provided by Ecoflight shows the result of flash floods that swamped well pads and in some cases dislodged storage tanks in Weld County, Colo. Hundreds of natural gas and oil wells along with pipelines are shut down by flooding, as state and federal inspectors gauge the damage and look for contamination from inundated oil fields. (AP Photo/Ecoflight, Jane Pargiter)

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  • Danger is spray-painted on a damaged section of Old Highway 34 in Loveland, Colo., on Wednesday, Sept. 18, 2013. As floodwaters recede, cleanup and damage assessment continues after historic flooding. (AP Photo/Chris Schneider)

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