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BOULDER, Colo. (AP) - Boulder authorities say resumed air rescue efforts are planned for today.

The Office of Emergency Management says that the weather is expected to be clear enough to allow helicopters to take to the skies to rescue flood victims.

The officials are urging people who have been unable to communicate by phone or other means to signal helicopters passing overhead any way they can, including sheets, mirrors, flares or signal fires.

Many communities are still cut off by flooding from a week of heavy mountain rains. Rain hampered the helicopter searches yesterday, and rescuers trekked by ground to reach some isolated homes. The surging waters have been deadly, with four people confirmed killed and two more missing and presumed dead.

Emergency officials say some 1,500 homes have been destroyed and about 17,500 have been damaged by the flooding that began in the middle of last week. More than 1,200 people have not been heard from.

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