As the search for missing persons in the aftermath of a massive mudslide in Washington enters its second week, some searchers will be taking a much-needed break.

Rescue dogs, who have been essential in the search for victims of the mudslide that hit Oso, Wash., on March 22, will be getting some rest after working long hours in the cold and rain, rescue crews said Sunday. The dogs can lose their sensing ability if overworked, officials said, according to the Associated Press.

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