Extreme Rainfall in Brazil Linked to Varied Mortality Outcomes Across States
A study analyzing daily mortality rates in Brazil from 2003 to 2023 has revealed that extreme rainfall events have differing impacts on health outcomes across various states. The research, which focused on all-cause, cardiovascular, respiratory, and infectious mortality, found substantial heterogeneity between states. Some regions experienced protective effects due to pollution washout and cooling, while others faced increased risks associated with flooding, contamination, and access disruption. The study utilized state-level conditional quasi-Poisson models to assess the effects of rainfall and temperature, pooling results through multivariate random-effects meta-analysis to derive national exposure-response curves. 
