Summary:
- A sudden release of water from a glacial lake in Alaska caused a record-breaking river crest in Juneau, the state's capital city.
- The glacial lake, located on the Mendenhall Glacier, had been slowly filling up over time due to melting ice. When the lake's natural dam failed, a massive amount of water rushed down the Mendenhall River, leading to the highest river level ever recorded in Juneau.
- This event highlights the potential risks posed by the increasing number of glacial lakes as the climate warms, and the importance of monitoring and managing these hazards to protect nearby communities.