GENEVA — As Brazil’s heavily flooded southern state of Rio Grande do Sul braces for a weekend of intense rain, the U.N. refugee agency, UNHCR, is calling for greater support to help tens of thousands of refugees, who are among the most vulnerable people affected by the disaster. “Those affected include some 41,000 refugees and others in need of international protection, including many Venezuelans and Haitians who live in the affected areas — some of [whom] can only be reached by boat,” William Spindler, UNHCR spokesperson, told journalists Friday in Geneva. According to local authorities, at least 126 people have died in the floods, 141 are missing, about 2 million people are adversely affected, and more than 400,000 are homeless. Spindler said the UNHCR, in coordination with local authorities, is distributing…