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Glacial lake flood hits Juneau, Alaska, reflecting a growing global risk as mountain glaciers melt

  • Written by Alton C. Byers, Faculty Research Scientist, Institute of Arctic and Alpine Research, University of Colorado Boulder
imageU.S. Geological Survey staff check monitoring equipment in Suicide Basin in June 2025. By August, the basin had filled with meltwater.Jeff Conaway/U.S. Geological Survey

Each summer in the mountains above Juneau, Alaska, meltwater from the massive Mendenhall Glacier flows into mountain lakes and into the Mendenhall River, which runs through town.

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Read more: Glacial lake flood hits Juneau, Alaska, reflecting a growing global risk as mountain glaciers melt

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