Flash Flood Fears Along Teesta as Landslide Partially Blocks River in Sikkim; Downstream Areas Put on Alert
A landslide in Sikkim’s Mangan district during the night of September 5–6 has partially obstructed the flow of the Teesta River, raising concerns about sudden changes in downstream water levels. Authorities are closely monitoring the situation, while heavy rainfall across parts of the Northeast is adding to the risk of landslides and flooding.
NETB24
Mangan, Sikkim, September 6: Concerns over a possible sudden rise in water levels along the Teesta River have emerged after a major landslide in North Sikkim partially obstructed the flow of the Teesta and the Chyakoong rivers.
The landslide occurred during the intervening night of September 5 and 6 in the Naga Forest area along the Naga–Tosa Road, opposite the Theng Tunnel and near the confluence of the two rivers, according to the Mangan district administration.
A substantial portion of the hillside collapsed, temporarily blocking the Teesta and causing water to accumulate in the river channel. However, officials said the Teesta is currently flowing normally, while both rivers continue to maintain partial flow through the affected stretch. No casualties or injuries have been reported so far.
Authorities have intensified monitoring of the river belt and are keeping a close watch on water levels at locations including Sankalang and Phidang. The police control room has also been instructed to alert vulnerable areas in the lower belt as a precautionary measure.
The development has raised fears among communities living close to the Teesta that a sudden release of accumulated water could potentially trigger rapid flooding in downstream areas. However, officials have not reported any immediate danger and are continuing to assess the situation at the landslide site.
The incident comes amid heavy rainfall across parts of the Himalayan region, increasing the risk of landslides and sudden changes in river levels. The India Meteorological Department has also forecast heavy rainfall in several northeastern states, including Arunachal Pradesh, Assam and Meghalaya.
Residents living along the Teesta riverbank and in vulnerable low-lying areas have been urged to remain alert, avoid unnecessary movement near the river and follow instructions issued by local authorities.
Officials are continuing to monitor the Teesta and the affected landslide zone, with further updates expected following a detailed assessment of the site.
