Bihar Disaster Management Department (DMD) principal secretary Vyasji said the state government has put its personnel on alert and instructed the affected districts to make arrangements to evacuate 1.5 lakh people in eight districts along the Kosi as 10-metre high wave of water is expected to sweep down the Kosi River through Nepal.
He said the state government has also sought the help of the army.
"We have sent our own team of engineers and officials to the site where Bhote Kosi, a major tributary of Kosi River has been blocked due to an enormous landslide last night, damming the river and resulting in a massive accumulation of water. The team will immediately inform us when the Nepal Army blasts the debris to free the river," said Vyasji.
The landslide and ensuing damming of Bhote Kosi has occurred at a place called Jure in Sindhupalchok district in Nepal. It is located north of Kathmandu and around 260 km from the Bihar-Nepal border.
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"We are requesting the Nepal government to drill holes instead of blasting the debris. It will ease the flow instead of creating a flash flood like condition," added Vyasji.
The DMD Principal secretary said experts estimate that 40 per cent of the water that will gush down the Kosi and will reach Bihar. He also said that the calculation says that the water will take around 14 hours to hit the state.