Authorities lifted mandatory evacuation orders Tuesday for communities below the Oroville Dam. At a news conference Tuesday afternoon, Butte County Sheriff Kory Honea announced the order had been changed to an evacuation warning after he said the risk of flooding had been reduced. "We have concluded it is safe to reduce the emergency evacuation order to an evacuation warning"said Honea, who had made the initial call Sunday to evacuate a large swath of three counties below the imperiled dam. At the time, residents were told the spillway to the dam could collapse within an hour. Roadblocks on the two main...