The neighbouring state of Assam is also under threat and preparations are underway to help stranded villagers. More than 20,000 homes have been destroyed and thousands of acres of crops and thousands of cattle have been lost because of the floodwaters. The army has been called in to help those who have been cut off by the rising waters and air force helicopters are reported to have carried out rescue missions. Air force helicopters are also said to have rescued more than 200 people marooned in Assam, including some from treetops. Floodwaters are also posing a threat to the 250 sq mile Kaziranga National Park, home to the world's largest population of the one-horned rhinoceros.
Floods are an annual feature in the region, destroying acres of cropland and villages.
Officials say the situation this year may have been caused, in part, due to heavy rain in China, which lies to the north.