ARLINGTON, Wash. -- The frantic search for survivors continues in Washington after a massive mudslide of dirt, rocks and trees killed 8 people and people and injured several others, sheriff's officials said Sunday.Eighteen people are still unaccounted for and could be trapped in the mud, up to 15 feet in some areas.As over 100 rescue workers looked for survivors scoured the nearly square mile of mud, the state's governor toured the damage by air."The devastation is just unrelenting and awesome. There really is no stick standing in the path of the slide," said Gov. Jay Inslee.About 60 miles north of Seattle a rain-soaked hillside gave way swallowing everything in its path."The mud was too thick and deep. They couldn't hear any signs of life once they got closer, so they decided to back out," said Travis Hots, the Snohomish County Police Chief.The mudslide blocked the Stillaguamish River, making a serious flood another real possibility. Officials are trying to figure out the best way to move forward without putting more lives at risk. There is a flood evacuation order in place for all residents living downstream in the local area.