The second round of floods was caused by incessant rain in the adjoining states of Arunachal Pradesh, Nagaland and Meghalaya, and neighbouring Bhutan.
The rains in India have triggered fresh spell of floods in many states.
"We have opened 268 relief camps that are housing 63,797 people". In eastern Assam's Tinsukia district, authorities ordered 225 schools to remain shut as the situation worsened. Around 1 lakh hectares of cropland has also been submerged.
The National Disaster Response Force (NDRF) is conducting rescue operations across the state.
The first wave of floods that ended mid-July had killed 84, some due to landslides and electrocution in flooded areas. The army has also been put on stand by alert for emergency rescue operations, news agency PTI reported.
A report of the State Emergency Response Centre of the Disaster Management wing said several major rivers, including Howrah River, which passes through the capital city, were flowing above the danger mark.
Rivers Puthimari and Pagladiya in Baksa, Kamrup and Nalbari district of Assam are likely to flow in Moderate to High flood situation during 10th to 14th August 2017.
On the other hand, over 70 per cent areas of Kaziranga National Park now in the grip of flood and wild animals have been forced to take shelter in safer places.
While seven of the 12 affected areas were already repaired and the lines certified for train running at controlled speed, in four sections train running are suspended till the situation improves. Proper rehabilitation measures have been taken for affected people and no stone would be left unturned in helping the distraught people at this hour, he added.
In Arunachal Pradesh, the unrelenting monsoon rainfall is creating havoc across the state with reports of floods and road blockades pouring in from various quarters.
He also announced a package of Rs 2,000 crore for the flood and landslide-affected states of the region. The Brahmaputra was flowing above the danger mark at Nematighat, Dibrugarh, Tezpur and Dhubri, the ASDMA stated in a bulletin on Saturday evening.