Juneau Faces Annual Glacial Flood Challenges
Juneau, Alaska, continues to grapple with annual glacial lake outburst floods caused by a retreating glacier in the nearby mountains. For the past 15 years, a glacial lake has burst through its ice dam each summer, sending billions of gallons of water downstream into the Mendenhall River. The floods have become increasingly severe, with the 2023 event causing significant damage to homes and infrastructure. In response, the U.S. Army Corps of Engineers has installed military-grade flood barriers, some as high as 16 feet, to protect the city. Despite these efforts, the floods remain a persistent threat, with the 2026 event ranking as the fourth largest on record. Local officials and residents are calling for a long-term solution, such as a proposed 'lake tap' tunnel to drain the glacial basin before it overflows.