Brazil suffered from periods of severe heat and drought last year. In October 2023, the Rio Negro, the second largest tributary of the Amazon, reached its lowest level in the port of Manaus since records began in 1902.
Villages were isolated, dolphins died, and fish could not tolerate the water that was far too warm. Researchers say the conditions for this will become more common as a result of climate change and could provide a hint of what's to come. The question now is whether ecosystems and people can adapt.