Reports said that most of the state's rivers are in spate and flowing above the danger level.
Official sources described the flood situation in the state as very grim on Friday.
The Brahmaputra river is flowing above the danger level at several places, including Dibrugarh, Jorhat and Guwahati. Lakhimpur, Dhemaji and Jorhat have been described as the worst-hit districts.
Vast tracts of land have been submerged by breaches in river embankments.
In Majuli, the world's largest inhabited river island, a breach in the embankment, has left over 100,000 people stranded in Jengraimukh, Nayabazar, Fuloni, Halodiati and Kherakotaunkh areas.
Personnel of the National Disaster Rescue Force have arrived in the area to rescue the affected people.
The situation in lower Assam districts of Baksa, Barpeta and Udalguri is also grim following release of water from the Kurishu dam in Bhutan. In Dhemaji, the Semen river has inundated vast tracts in Jonai sub-division while the River Gai and Jiadhol are also in spate.(ANI)