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U.S. Rivers Heatwaves Threaten Trout and Salmon Survival

9/30/2025

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Summary

Story summary

U.S. rivers face riverine heatwaves that heat faster and last longer than air heatwaves.
From 1980 to 2022, river temperatures rose two to four times faster than air temperatures.
Cold-water fish like trout and salmon are particularly affected as temperatures rise.
Climate change drives heatwaves. Urban rivers face more intense heatwaves, while researchers call for monitoring and policy changes.

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Story summary

U.S. rivers face riverine heatwaves that heat faster and last longer than air heatwaves.
From 1980 to 2022, river temperatures rose two to four times faster than air temperatures.
Cold-water fish like trout and salmon are particularly affected as temperatures rise.
Climate change drives heatwaves. Urban rivers face more intense heatwaves, while researchers call for monitoring and policy changes.