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U.S. rivers are facing more frequent, intense, and longer heat waves due to climate change, threatening cold-water fish.
U.S. rivers are experiencing more frequent, intense, and longer-lasting heat waves, with a new study finding a 1.8-event-per-year increase since 1980, temperatures up to 0.8°F higher, and durations over three days longer.
Analyzing data from 1,471 stream sites, researchers attribute the trend to human-caused climate change, including reduced snowpack, slower flows, dams, and urban infrastructure.
Cold-water species like salmon and trout face greater stress due to lower oxygen levels and higher metabolic demands, risking fish kills.
The study, published in PNAS, highlights the urgent need for improved water management and public awareness of water quality as a climate issue, noting that river heat waves are accelerating faster than air heat waves.
Los ríos de Estados Unidos se enfrentan a olas de calor más frecuentes, intensas y más largas debido al cambio climático, amenazando a los peces de agua fría.