New GLOF Disaster Strikes Near Huaraz, Peru: A Wake-Up Call for Glacier Lake Monitoring

• Post by: Randy Muñoz
• May 5, 2025
• Comments off

On 28 April 2025, a glacier lake outburst flood (GLOF) originating near Vallunaraju (5680 m a.s.l.) in the Andes of Peru caused significant destruction in rural and urban parts of Huaraz. EClim member Christian Huggel shared initial insights and satellite analysis from the event, which likely started with a rock slope failure that triggered a wave and subsequent debris flow from a small lake (~50,000 m³).

The flood traveled rapidly down the Casca River, destroying around 15 buildings, damaging over 100 houses, and tragically causing the deaths of 2–3 people. The lake in question likely formed in the 1970s as the Vallunaraju glacier retreated—illustrating the growing hazard posed by even small, high-altitude lakes in a warming climate.

This event:

• Highlights the urgent need for early warning systems and monitoring of glacier lakes and unstable slopes in high-mountain regions.
• Underscores the interconnectedness of cryosphere, hazards, and community vulnerability.
• Occurred just 10 km from Lake Palcacocha, central to the ongoing Lliuya v. RWE climate litigation case. A ruling is expected soon, though delayed due to a challenge to the impartiality of the court’s expert.

Local institutions like INAIGEM and UNASAM, along with international researchers including Huggel and fellow EClim member Simon Allen, are working to improve risk reduction in these fragile mountain environments.

🔗 Christian Huggel’s full comment: https://www.linkedin.com/posts/christian-huggel-433671258_glof-huaraz-andes-activity-7323317463310344192-vtTI