PORTLAND, Ore. -- Authorities say four cellphone tower workers stranded by a storm on Oregon's Steens Mountain have holed up in a concrete block building at about 9,000 feet, where they have food, water and heat.

Harney County search and rescue coordinator Matt Fine says whiteout conditions foiled an effort to rescue them by snowmobile on Monday, so the workers faced a third night on the mountain.

Fine says the weather is expected to improve Tuesday.

The four men are reported warm and safe in the structure at the base of the tower they've been working on.

Harney County Sheriff Dave Glerup says their lives aren't in danger.

He says the four tried to leave the mountain in poor visibility Saturday. They got off the road and got stuck, spent the night in their snow vehicle and got back to the concrete structure the next day.

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