The Brahmaputra was flowing above the danger level at Neamatighat in Jorhat district while the Jia Bharali at N T Road crossing in Sonitpur district in lower Assam, the sources said.
In the worst-hit Dhemaji district, most of the roads had been damaged or affected by the floods that have completely or partially submerged several roads.
Several road embankments have been eroded and approaches of bridges and culverts washed away by the floods, they said.
The flood-affected districts are Dhemaji, Tinsukia, Golaghat, Jorhat, Kamrup, Karimganj and Lakhimpur.