The death toll has risen to 84 so far.
Over 25 lakh people have been affected in 24 districts.
State and National Disaster Response Force teams are carrying out relief and rescue works.
In all, 1.21 lakh hectare crop areas are submerged due to flood.
Chief Minister Sarbananda Sonowal visited the flood-affected Barpeta and Nalbari districts.
Sonowal said that the Prime Minister has assured all help to the state government to face the situation.