A large fire at the historic Centennial Mills warehouse in Portland has led to significant safety and health concerns. K-9 teams have indicated a high likelihood of human remains within the rubble, prompting an ongoing investigation as city officials work towards demolition plans for the structurally compromised building. Meanwhile, testing has detected asbestos in debris, although authorities assert that the levels pose a low risk to nearby residents. The fire, which destroyed the 116-year-old structure, has also resulted in the indefinite suspension of Amtrak service between Portland and Seattle, affecting transportation options in the region. Public parks nearby have been closed as precautions are taken to assess potential hazards from the site.