Guwahati, July 29 -- Incessant rainfall caused the Teesta River to breach its embankment at 29 Mile, flooding a vital stretch of National Highway 10 (NH-10) and cutting off road access to Sikkim, as well as Kalimpong and Darjeeling districts in West Bengal, officials reported on July 29.

A landslide at Tarkhola in Kalimpong further disrupted the flow of traffic between Sevoke in West Bengal and Rangpo in Sikkim, making travel in the region increasingly difficult.

Another major landslide at Bardang, located between Singtam and Rangpo, completely blocked NH-10, officials confirmed. They noted that clearing the debris will take time, as persistent rains since Sunday continue to hinder restoration work.

In Gangtok district, multiple landsl...