The toll in Bihar rose to 341 and touched 82 in Uttar Pradesh.
However, the flood situation eased in Assam and northern districts of West Bengal with water receding and no fresh deaths being reported in both the states.
The floods in Bihar has affected 18 districts of the state with around 7.61 lakh people shifted to safer areas. The toll stood at 304 till yesterday with 1.38 crore people battling the deluge.
According to a road construction department a total 203 state highways and other roads under it were damaged in flood waters in different places out of which 95 per cent have been repaired and made motorable.
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Araria district accounted for 75 deaths alone, followed by Sitamarhi and West Champaran (36 each), Katihar (26), Kisanganj (23), Madhubani (23), East Champaran, Darbhanga and Madhepura (19 each), Supual (15), Gopalganj (14), Purnea (9) Muzaffarpur (7), Khagaria (6), Saran (6) and Saharsa (4), Sheohar (4), an official said.
Kumar would stay at Purnea tonight and would go to Araria, Katihar and Kisanganj tomorrow, the official said.
A total of 1,608 community kitchens were under operation in flood affected areas which served meals to 4.52 lakh people, a state Disaster Management department report said.
Light to moderate rainfall occurred at one or two places in the state since yesterday as the southwest monsoon is getting weak in the state, the MeT department has said.
Gaya recorded the highest maximum temperature of 35.2 degrees Celsius, followed by 35 degrees Celsius at Bhagalpur, 34.8 degrees Celsius in Patna and 33 degrees Celsius in Purnea.
The flood situation in Uttar Pradesh remained alarming with reports of 10 more deaths, taking the toll to 82 in the current wave of deluge in the state.
"The death toll in the floods has reached 82 in the state, where 2,855 villages in 25 districts are inundated affecting a population of over 22 lakh," the relief commissioner's office said here citing a flood report compiled till yesterday.
Army choppers, 26 companies of the NDRF, and 30 companies of PAC (flood) jawans continued relief and rescue operations round the clock in the severely hit areas of the flood- affected districts of the state.
However, the flood situation in Assam improved further with the water receding from human habitation and agricultural fields, giving relief to more people in the 12 affected districts of the state.
Altogether 11.02 lakh people, against yesterday's 14.36 lakh people, were hit by the floods that have submerged 9,000 hectares of farm fields, it said.
The districts still affected include Dhemaji, Lakhimpur, Barpeta, Chirang, Kokrajhar, Dhubri, South Salmara, Goalpara, Morigaon, Nagaon, Golaghat and Majuli.
Water of the Brahmaputra river was still flowing above the danger mark at Nimatighat at Jorhat and Dhubri town, while Dhansiri river is flowing above the danger mark at Numaligarh in Golaghat and Kopili river at Dharamtul in Nagaon district.
In view of an alleged inordinate rise in air fares following disruption of train services, the chief minister also requested Union Minister of State for Civil Aviation Jayant Sinha to maintain "reasonable fare" of flights to the Northeast.
The situation in the six-flood hit districts of north Bengal too has improved a lot in the absence of major rainfall and people have started returning to their homes.
Floods in West Bengal have claimed 152 lives so far and affected around 1.5 crore people.
"Water has started receding from the flood-hit areas in these districts and people are returning home. The situation is improving everyday," he said.
Trains, however, did not ply in the region as rail tracks remained inundated.