Flooded Brazil 'ghost town' a climate warning to world, UN adviser says

sao paulo, brazil — Record floods that killed over 170 people and displaced half a million in southern Brazil are a warning sign of more disasters to come throughout the Americas because of climate change, an official at the United Nations refugee agency said on Tuesday.   Roughly 389,000 people in the state of Rio Grande do Sul remain displaced from their homes because of the intense rain and flooding, which local officials say was the worst disaster in the region's history. Scientists say climate...