ARLINGTON, Wash. – Becky Bach watches and waits, hoping that search crews find her brother and three other relatives who are missing in the deadly mudslide.

Doug Massingale waits too, for word about his 4-month-old granddaughter. Searchers were able to identify carpet from the infant's bedroom, but a logjam stood in the way of a more thorough effort to find little Sanoah Huestis, known as "Snowy."

With little hope to cling to, family members of the missing are beginning to confront a grim reality: Their loved ones might never be found, remaining entombed forever inside a mountain of mud that is believed to have claimed at least 24 lives.

"It just generates so many questions if they don't find them," Bach said. "I've never known anybody to die in a natural disaster. Do they issue death certificates?"

Search crews using dogs, bulldozers and bare hands kept slogging through the mess of broken wood and mud again Wednesday, looking for more bodies or anyone who might still be alive. But authorities have acknowledged they might have to leave some victims buried.

Trying to recover every corpse would be impractical and dangerous.

Searching is hazardous

The debris field is about a square mile and 30 to 40 feet deep in places, with a moon-like surface that includes quicksand-like muck, rain-slickened mud and ice. The terrain is difficult to navigate on foot and makes it treacherous or impossible to bring in heavy equipment.

To make matters worse, the pile is laced with other hazards that include fallen trees, propane and septic tanks, twisted vehicles and shards of shattered homes.

"We have to get on with our lives at some point," said Bach, who has spent the past several days in the area in hopes that searchers would find her brother, his wife, her 20-year-old great-niece and the young girl's fiancé.

Sixteen bodies have been recovered, but authorities believe at least 24 people were killed. Scores of others are still unaccounted for, although many names were believed to be duplicates.

Agony for families

The knowledge that some victims could be abandoned is difficult to accept.

"Realistically … I honestly don't think they're going to find them alive," Bach said, crying. "But as a family, we're trying to figure out what to do if they find no bodies."

Bach spoke about a wedding the family had planned for summer at the rural home that was destroyed. And how, she wondered, do you plan a funeral without a body? "We'll probably just have a memorial, and if they find the bodies eventually, then we'll deal with that then."

In previous mudslides, many victims were left where they died. Mudslides killed thousands in Venezuela in 1999, and about 1,500 bodies were found. But the death toll was 5,000 to 30,000, so the government declared entire neighborhoods "memorial grounds."

Two Washington National Guard Blackhawk helicopters arrived at the site Wednesday to relieve sheriff's helicopter crews that had been working since Saturday.

The Blackhawks' sole mission is body removal, said Bill Quistorf, the chief pilot for the Snohomish County Sheriff's Office.