Assam State Disaster Management Authority (ASDMA) in its flood report said that more than 31,700 people are affected in Dhemaji and Karimganj districts.
The highest number of 31,500 people have been affected in Karimganj district, followed by 150 in Dhemaji, it said adding around 110 hectares of crop areas are under the water now.
The toll in this year's flood in Assam has remained at five -- two in Lakhimpur and one each in Bongaigaon, Baksa and Sonitpur.
At present, Katakhal river is flowing above the danger mark at Matizuri in Hailakandi district, the ASDMA report said.