River levels were rising again Sunday as strong rains lashed waterlogged southern Brazil, where flooding has killed more than 140 people and forced hundreds of thousands from their homes.Residents of the state of Rio Grande do Sul were bracing for fresh misery from the new rains, after two weeks of downpours saw rivers burst their banks, swallowing up towns and parts of the regional capital.More than two million people have been affected by the deluge which experts link to climate change exacerbated by the El Nino weather phenomenon.The levels of “practically all the major rivers in the…