More than 180,000 people are homeless in the cities of São Leopoldo and Novo Hamburgo alone. Cid Guedes / Shutterstock May 16, 2024 Floods in south Brazil have displaced 600,000 – here’s why this region is likely to see ever more extreme rain in future Marcia Zilli, University of Oxford; Caio Coelho, Instituto Nacional de Pesquisas Espaciais (Inpe), and Neil Hart, University of Oxford ‘Flying rivers’ of moist air from the Amazon combined with a warming planet have the potential to produce more rain, say scientists.