After showing signs of improvement in the past one week, flood situation in Assam worsened on Sunday because of heavy rain in Arunachal Pradesh.
About 71,819 people in five districts are affected by flood while 28,600 in three districts had been hit by the deluge.
Sonitpur and Nagaon were added to flood-hit districts of Dhemaji, Morigaon and Nagaon, a report by the Assam State Disaster Management Authority said.
One person has been missing in Sonitpur district. Road link to neighbouring Arunachal Pradesh was cut and crops on 13,928 hectares were affected.
Sonitpur district is the worst hit with 41,533 people affected when several areas were inundated by flood waters that also submerged National Highway-15, district administration sources in Tezpur said.
A key town of Balipara is also flooded, the sources said. The town connects Lakhimpur, Dhemaji, Jonai of Assam and several districts of Arunachal Pradesh and its capital Itanagar via NH-15.
Following the rain in Arunachal, water of Kameng entered areas including Rangapara, Balipara and Chariduar, the sources said adding the road connectivity from Balipara to Bhalukpong in Arunachal Pradesh has been disrupted.