'It's terrifying': Race against time to rescue Brazil's flood victims after dozens killed

Porto Alegre (Brazil) (AFP) – Authorities were racing against time on Sunday to rescue people from raging floods and mudslides that have killed more than 50 and forced nearly 70,000 to flee their homes in southern Brazil.

Viewed from the air, Porto Alegre, the capital of Rio Grande do Sul state, is completely flooded, with streets waterlogged and the roofs of some houses barely visible.

The Guaiba River, which flows through the city of 1.4 million people, reached a record high level of 5.09 meters (16.9 feet)...