A reported glacial lake outburst at Sintaphu Lake in Bhutan’s northern Gasa district on the evening of October 29, 2026, triggered severe floodwaters along the Mo Chhu, washing away the famous Gasa Tshachu hot spring complex and causing extensive damage to local road infrastructure. Floodwaters reached Taktsemakhang around 8:15 pm, destroying a critical section of the road serving Laya—one of Bhutan’s most remote highland communities—and forcing its immediate closure to all vehicular traffic. Additionally, a section of the Punakha-Gasa Secondary National Highway near the 31.85-kilometre mark was completely washed away, prompting emergency authorities to shut down the highway indefinitely and advise travelers to postpone non-essential journeys until further notice. Emergency response protocols were activated immediately following the surge, with warning sirens sounding and residents in potentially vulnerable, low-lying areas being evacuated to safer ground as a precautionary measure. While officials have confirmed that no casualties or injuries were reported as of the morning of October 30, downstream areas, including communities situated along the Sankosh River in neighbouring India, have been issued precautionary warnings and alerts. The National Center for Hydrology and Meteorology, which registers the body of water as Sintaphu Lake in official technical records—despite early regional reports referring to it as Shintaphu or Chintaphu—continues to assess the situation alongside local disaster management teams to determine the precise trigger mechanism, the total volume of released water, and the complete environmental and economic impact of the event while restoration efforts get underway.
