In 2011, I embarked on a journey to Lake Imja in Nepal’s Everest region, reaching an altitude of about 17,000 feet alongside scientists and engineers. Reflecting on this expedition from my home in Peru, I witnessed the alarming impact of permafrost weakened by warming in Rasuwa, near Nepal’s border with Tibet.
As glaciers recede, they create depressions in the landscape. Meltwater from the glacier accumulates in these indents, forming lakes that grow until pressure causes potential breaches, particularly if earthquakes occur. Lake Imja didn’t exist in 1953 when Sir Edmund Hillary scaled Everest, yet by 2011, it became the fastest-growing of around 1,600 glacier lakes in Nepal. During our visit, the lake extended 1.5 miles from the glacier, precariously retained by debris, posing risks of water release that could devastate nearby communities.
On August 26, a separate catastrophic event unfolded in Rasuwa. A large glacier piece, possibly the size of a New York City building, fell 4,000 feet, triggering a tsunami. This high-speed descent generates friction, melting ice and forming a destructive wave that swept away ice, snow, water, rocks, mud, and man-made structures through narrow valleys, erasing lives, communities, and infrastructure. Winds akin to hurricanes toppled trees.
Though safe as I write, similar events may occur in Peru and other mountainous areas, including Nepal. Ice and snow weakened by rapid warming threaten vulnerable regions downhill. Our Lake Imja expedition left us anxious but also contemplating prevention strategies.
Early warning systems equipped with real-time sensors and satellite communication can detect abrupt water discharges, alerting communities downstream. Incrementally reducing water levels in risky glacial lakes and reinforcing infrastructure could mitigate disaster risks.
Lake Imja’s circumstances differ slightly from Rasuwa’s disaster, but they share imminent danger akin to Peru’s situation. In Huaraz Province, Palcacocha, a glacial lake, confronts similar warming issues as seen in Nepal. Over 100,000 residents, including schools and communities, are directly threatened if meltwater triggers a chain reaction like that in Nepal.
As executive director of Instituto Andino de Montaña in Peru, I lobbied for an early warning system in Huaraz, achieving success. However, pursuing efforts to lower the lake’s water met bureaucratic inertia. Concerns about scaring tourists blocked funding and commitment. With the ongoing El Niño event, our fears heighten during this season.
Grassroots Peruvians in rural settings harbor distrust towards authorities who fail to safeguard them against known hazards. Huaraz’s distance from Lima, the capital, leaves at-risk residents feeling overlooked. Government efforts to shift responsibility to local or private entities falter as local, provincial, or regional actors lack technical expertise for complex engineering tasks.
The U.S., where I earned my Ph.D., faces similar threats. Melting glaciers already cause serious floods and mudslides. A glacial lake outburst flood occurs annually since 2011 at Suicide Basin on the Mendenhall Glacier near Juneau, Alaska. Grasshopper Glacier’s rapid retreat in Wyoming’s Wind River Mountains spurred a similar flood in 2003. American communities encounter an insidious danger from toxic minerals and metals leaching into water supplies due to melting glaciers.
If calamities strike my country or various American communities as the threat evolves, there will be official mourning. It’s vital to channel energy and compassion towards proactive measures now to save lives rather than mourn them.
Jorge Recharte Bullard Ph.D. has led Instituto Andino de Montaña as its president since 2020, having served as director of The Mountain Institute’s Andean program from 1997 to 2019.
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