Update 5: The Spokane Spokesman-Review reports that Gov. Jay Inslee was notified about the tunnel breach by the Energy Department and the White House on Tuesday morning. Inslee called the event "a serious situation." "Federal, state and local officials are coordinating closely on the response," Inslee said, said, with the state Ecology Department in close communication with the Energy Department. There were no plans for Inslee, who is making several previously planned stops in Skamania County on Tuesday, to go to Hanford, his staff said.

Energy Secretary Rick Perry had been briefed, federal officials said, adding that "everyone has been accounted for and there is no initial indication of any worker exposure or an airborne radiological release." 

U.S. Sen. Maria Cantwell, D-Wash., released a statement as well: "Worker safety must be our number one priority, and we need to understand whether there has been any environmental contamination resulting from the subsidence at these tunnels. My thoughts are with the first responders who are working to assess the situation on the ground, monitor any environmental impacts and design next steps for securing the area."