Intense monsoon rainfall triggered extensive hillside collapses near the confluence of the Teesta and Chakung rivers, prompting Sikkim disaster management authorities to issue emergency flash flood warnings for downstream settlements.
The massive rock and mud debris blocked natural river channels along the boundary between North and South Sikkim, creating temporary water reservoirs that pose imminent breach risks to riverside communities. The Sikkim State Disaster Management Authority mobilized warning sirens and dispatch teams across vulnerable riverine zones, including Singtam, Rangpo, and Melli.
District administrative task forces initiated immediate evacuation protocols, relocating over four hundred families from riverbank settlements to elevated government school buildings and community shelters. Engineers from the Border Roads Organisation and state public works departments deployed earthmoving excavators to clear crucial arterial stretches of National Highway 10, which was severed by multiple secondary slips.
Geological survey teams deployed drone mapping systems to calculate the volume of the artificial lake formed behind the landslide dam, estimating that tens of thousands of cubic meters of impounded water require controlled drainage. The Trishakti Corps of the Indian Army established temporary satellite communication terminals across cut-off sectors to maintain connectivity with disaster coordination hubs in Gangtok.
Central Water Commission monitoring stations reported sharp water level fluctuations along the Teesta basin, urging local panchayats to keep night patrols operational along critical bunds and bridges. Emergency supply convoys carrying potable drinking water, blankets, and essential medical supplies were positioned in Gangtok for swift air-dropping if access roads remain obstructed.
Chief Minister Prem Singh Tamang convened an emergency coordination conference with defense forces and paramilitary units, directing round-the-clock surveillance of dam spillways and fragile slopes across the high-altitude watershed.
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Sources:
https://www.aajtak.in/breakingnews/story/latest-breaking-news-in-hindi-6-september-2026-ntc-rmxk-2637227-2026-09-06