Brumadinho: An alarm warning of an imminent mining dam rupture was activated early Sunday in Brumadinho, the same Brazilian community where a dam break downd eliminateing 34 and leaving measure 300 lost, firefighters and the mining company said.The alarm went off at 5:30 am (0730 GMT) warning of dangerously high water levels at a dam that is part of the Corrego do Feijao mining complex, a statement by the Vale mining company said. A dam at the same mining site burst Friday, spewing millions of tons of sludge, sweeping absent and burying buildings and people in its path.Firefighters said they were evacuating communities approach the dam.