BRAZIL — Extreme weather has made 2023 virtually certain to be the warmest year on record, signaling unprecedented climate and biodiversity crises. Brazil, the world’s most biodiverse country, with two hotspots and complex social and economic layers, has experienced escalating environmental degradation over the past years. Alarming rates of native vegetation loss, wildfires, severe and prolonged droughts, and heatwaves have adversely impacted several Brazilian ecosystems and societies. Despite the country’s decisive role in global carbon neutrality, bridging the gap between Brazil’s discourse on the international stage and its concrete actions at home remains a significant challenge. This correspondence underscores the urgent imperative for national engagement and commitment to halt and mitigate these crises.