RIO DE JANEIRO (AP) — Scientists have long been warning that extreme weather would cause calamity in the future. But in South America — which in just the last month has had deadly landslides in Brazil, wildfire in Argentine wetlands and flooding in the Amazon so severe it ruined harvests — that future is already here. In just three hours on Feb. 15, the city of Petropolis, nestled in the forested mountains above Rio de Janeiro, received over 10 inches of rainfall – more than ever registered in a single day since authorities began keeping records in 1932. The ensuing...