Sikkim Reflects on Lessons Three Years After South Lhonak Disaster
Sikkim Reflects on Lessons Three Years After South Lhonak Disaster
IN · Published Oct 7, 2026
• Three years after the catastrophic South Lhonak glacial lake outburst flood (GLOF) in North Sikkim, the state continues to grapple with the lessons of disaster preparedness and climate resilience.
• The 2023 disaster caused widespread destruction, including the loss of nearly 200 lives, damage to infrastructure, and the collapse of the Chungthang hydropower project.

Impact & Risks

The South Lhonak disaster highlighted the vulnerability of Sikkim's infrastructure and communities to natural hazards exacerbated by climate change. The region's fragile terrain, combined with human activities such as unregulated construction and hydropower projects, increases the risk of future disasters. The destruction of critical infrastructure, such as roads and bridges, during extreme events can leave communities isolated and hinder rescue operations. Experts stress that while scientific monitoring has improved, the effectiveness of early warning systems depends on timely communication, public awareness, and actionable evacuation plans.

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