Sikkim Weather Update 2025: Teesta River Overflows, NH-10 Blocked By Landslides And Rain

Continuous rainfall across Sikkim and the Darjeeling hills has caused the Teesta River to breach its embankment at 29th Mile, inundating a critical stretch of National Highway 10 (NH-10), the lifeline linking Sikkim and Kalimpong to Siliguri. This has severed road connectivity to Sikkim, as well as the Kalimpong and Darjeeling districts of West Bengal, according to officials. Traffic also came to a halt on the Peshok Road, which connects Darjeeling to Kalimpong.

The Teesta began rising on Monday evening due to rainfall in the upper reaches of Sikkim. Flooding was also reported at Rabijhora — near Teesta Bazar, where Peshok Road meets NH-10.

NH-10 and Other Routes Affected

In Sikkim, several landslides were reported around Gangtok. The local administration has deployed workers and machinery to clear debris and restore access. In Kalimpong, a significant landslide at Tarkhola disrupted the route between Sevoke (in West Bengal) and Rangpo (in Sikkim), further complicating travel across the region.

Officials confirmed a major landslide at Bardang — between Singtam and Rangpo — that completely blocked NH-10. They warned that debris clearance would take time due to ongoing rainfall hampering restoration efforts.

Multiple landslides in Gangtok district have cut off the Singtam-Dikchu Road. Serious damage has been reported in areas such as Tintek Khola and Kokaley.

Weather Forecast And Travel Advisory

The India Meteorological Department (IMD) reported heavy rainfall across Sikkim in the past 24 hours. The forecast indicates very heavy to heavy rain over the next 48 hours in Sikkim and the Darjeeling, Kalimpong, and Jalpaiguri districts of Bengal. Authorities have advised people to remain on high alert, as further rainfall may cause rivers and streams to overflow and trigger additional landslides.