Brazil's leading research institute, Fiocruz, is warning of a potential health crisis from the failure of a dam in the state of Minas Gerais, which released muddy mining waste and killed at least 134 people. The reservoir breach leached roughly 12 million cubic meters of reddish-brown mud, threatening to contaminate 48 municipalities and affecting up to 1.3 million residents. The institute is concerned that contamination of the ecosystem and nearby Paraopeba River could lead to the spread of diseases like dengue and yellow fever in communities surrounding the reservoir. For the full story, see https://www.apnews.com/3004c0472523418b83c5efe6590dea8d.