Some of them were swept away by the floodwaters. Rescuers have reached Tamenglong village to help other residents, said Deputy Commissioner Ravinder Singh. The village in Manipur state is nearly 600 kilometers (375 miles) south of Assam's state capital, Gauhati.
The June-September monsoon season often brings heavy rainfall, flooding and landslides to India, AP reported.
Waterlogged Mumbai was paralyzed for a third day, after flooding turned some streets into rivers and people waded through knee- to waist-deep waters.
Though there was some respite Wednesday, the Meteorological Department forecast more heavy rain this week.
On Tuesday, more than 500 people were rescued from an express train that got stuck because of waterlogged tracks. Public transport stopped for several hours and thousands of commuters were stranded in the worst-hit areas. Flights to and from Mumbai were delayed.
India's financial capital struggles to cope with the monsoon deluge every year, drawing criticism of its poor planning.