Soldiers in motor boats rescued thousands of marooned people and helicopters airdropped food after some of the worst flooding in years in India's northeast.
About 10 million people out of Assam's state 27 million population have been affected by flooding after rains in the past few days, more than 2,000 villages have been completely submerged, and the number of homeless has risen to to 3.5 million.
The second spell of flooding in less than a month has also spread across parts of Bangladesh, forcing half a million from their homes and leaving thousands stranded.
About three million people in Assam are living in temporary shelters, government buildings and schools.
Around 400,000 hectares (one million acres) of farmland have been flooded.
Since the annual monsoon rains began in June, about 50 people have been killed in Assam, and more rain has been forecast in the next 48 hours.
Prices of essential commodities have shot up across the region as landslides and flooding blocked highways at many places, and trucks carrying food and medicines were stranded.