A Glacial Lake Outburst in South Lhonak Lake in North Sikkim on the night of 03-04 Oct caused a devastating flood in the North Eastern State of Sikkim. The level of water in the Teesta River increased by about 50-60 feet in height which caused calamitous floods downstream. Large scale damage to infrastructure, property and loss of human lives have been reported. As per the State Govt estimate, a total of 142 persons are missing, out of which 26 bodies have been recovered so far. The exact assessment of the damage is yet to be corroborated due to the inclement weather and incessant rains.

Indian Army deployed in the area has also been affected with some of its camps along the Teesta River bank being damaged/ washed away. A vehicle parking area at Burdang near Singtam was affected by the flash flood and 23 soldiers and 39 vehicles that were taking a temporary overnight transit halt have been submerged in silt or swept away.

At the site of the incident, silt and mud measuring up to 30-40 feet high has been deposited and most of the vehicles are buried underneath. A massive Search and Rescue operation was immediately launched by the Indian Army, BRO along with NDRF, State Disaster Relief Teams, Para Military Forces, Police, Civil Administration and local populace of Sikkim & North Bengal.

On 4th Oct evening, one soldier was rescued by villagers from an area 18 km downstream of Burdang and the individual is now stable and under medical care. Approximately 26 bodies in total have been recovered so far from various areas along the river in North Bengal and four bodies have been handed over by Bangladesh Border Forces. Out of the 26 recovered bodies, eight have been positively identified as that of Indian Army soldiers. The last rites of Naik Bimal Oraon hailing from Alipurduar were conducted on 6th Oct 23 with full military honours. The mortal remains of four soldiers are being taken to their native places on 7th Oct by service and civil aircrafts for conduct of last rites in presence of the family members.

Post Mortem of two mortal remains is in progress. Meanwhile, the search operation for the remaining 14 soldiers continues.

Dozers and plant equipment have been digging up the site of incident at Burdang. Since 06 Oct 23, Radars (Leo Life Detector Radar, REECO Radar) and Army Dogs have also been employed. So far, 15 vehicles out of the total 39 missing have been recovered. Some ammunition, explosives and stores of the Indian Army from various camps swept away have been reported from various places along the downstream river banks. Indian Army has issued advisories through civil administration and deployed look out teams along with State Police to warn the locals for reporting sighting of such items. Ammunition experts have been deployed to destroy the explosives recovered in a controlled manner.

National Highway 10 (NH 10), the lifeline of Sikkim, has been rendered unusable due to damages to the road surface and many bridges across the Teesta River. The opening/ widening of road stretch Rangpo - Singtam is under progress.