The death toll from Brazil's devastating flooding continues to rise, making it the country's deadliest natural disaster on record. Authorities have estimated that at least 787 people have been killed so far, and the number is expected to go higher. Officials say at least another 400 people are missing. Days of heavy rains last week unleashed rivers of mud that leveled houses, threw cars on top of buildings and left at least 6,000 people homeless. Another 8,000 were forced to move to temporary housing. Landslides and floods are common in Brazil, often affecting poor communities where shacks are built on steep, unstable hillsides.