Although there was no report of loss of life, district administrations evacuated affected people to higher ground.
Dhemaji, Lakhmpur, Jorhat, Nagaon, Kamrup, Barpeta and Nagaon districts are the worst affected areas.
According to officials, heavy rains in Arunachal Pradesh have led to the overflowing of many rivers located downstream, causing the floods.
The state government has pressed into service the National Disaster Response Force (NDRF) and the State Disaster Response Force (SDRF) to rescue people from flood-affected areas.
A large portion of Kaziranga National Park has also been submerged, as well as low-lying areas of Dibru Saikhowa National Park in Tinsukia.
Fresh rains have inundated several villages in upper Assam with Brahmaputra flowing above the danger mark.
More than seven lakh people are said to be affected by the heavy and incessant rainfall over the past few days.
Official sources said that large tracts of agricultural produce have also been damaged due to the floods.