Amazon Lakes Reach Scorching Temperatures, Killing Endangered Dolphins

According to a new study, the Amazon region experienced a devastating climate change-driven heat wave and drought in September and October 2023, which had severe consequences for the local lakes and wildlife.

The study found that in half of the 10 Amazon lakes analyzed, daytime temperatures spiked to over 37°C (98.6°F) - temperatures rarely seen in large bodies of water, even in tropical regions. Lake Tefé, a 37-mile long lake in northwestern Brazil, reached a staggering 41°C (105.8°F), exceeding the recommended limit for hot tubs.

This intense heat was not just on the surface, but was detected at depths of over 6 feet, leaving no refuge for fish and dolphins. The extreme temperatures proved a death sentence for endangered Amazon river and tucuxi dolphins, with over 200 of their bodies found around Lake Tefé between late September and October 2023.

The heat wave also had a devastating impact on local communities. Thousands of people were left isolated and without proper access to food, water, and medicine as the disruption to aquatic ecosystems rippled through the region.

While the study focused on 2023, the central Amazon endured another extreme drought in 2024, again pushing lakes to record low levels and causing severe water heating. Researchers warn that Amazon lakes are facing a long-term warming process likely linked to climate change and global warming.