The country’s south received three months’ rain in two weeks. Global warming has made such deluges twice as likely as before, scientists said. The country’s south received three months’ rain in two weeks. Global warming has made such deluges twice as likely as before, scientists said. Global Warming, Floods, Rain, El Nino Southern Oscillation, International Federation of Red Cross and Red Crescent Societies, World Weather Attribution, Rio Grande do Sul (Brazil), Porto Alegre (Brazil) NYT > Science