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Rising River Heat Waves Endanger Cold-Water Fish

9/27/2025

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Summary

Story summary

Riverine heat waves are increasing in frequency, intensity, and duration.
In 2022, U.S. rivers experienced nearly two more heat-wave events than in 1980.
River heat waves last longer and are hotter, threatening cold-water fish.
Climate change and dams contribute to river warming.
The Ganges and Caspian Sea illustrate drying from climate change and human activity, signaling coordination and data sharing.

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Story summary

Riverine heat waves are increasing in frequency, intensity, and duration.
In 2022, U.S. rivers experienced nearly two more heat-wave events than in 1980.
River heat waves last longer and are hotter, threatening cold-water fish.
Climate change and dams contribute to river warming.
The Ganges and Caspian Sea illustrate drying from climate change and human activity, signaling coordination and data sharing.