The toll due to the flood since mid-May is now 101, they said.
The UNICEF said an estimated 2.4 million children have been affected by the recent floods in the country.
Many parts of Cachar district's severely affected Silchar town are still waterlogged.
The human toll in the floods and relentless rain across the country reached almost 200 by Thursday, even as thousands in Gujarat, Rajasthan, Assam, Odisha, West Bengal, and elsewhere were forced out of their homes into temporary shelters.
With the flood situation in Assam remaining critical on Monday and affecting a population of nearly 43 lakh in 33 of its 35 districts, Chief Minister Himanta Biswa Sarma directed air dropping of food and other relief materials in areas where there is heavy inundation, officials said.
A total of 1.79 lakh hectare agricultural land was submerged and around 90 per cent of rhino habitats -- the Kaziranga National Park and the Pobitora Wildlife Sanctuary -- are under water.
Flood waters today engulfed 22 villages in Assam's Bongaingaon and eroded 60 houses in Morigaon district displacing scores of people as the Bramhaputra river continued to flow above the danger level.
1 person died in Dibrugarh and Tinsukia district each taking the toll in current phase of floods to 31.
The flood situation remained critical in Assam, affecting over 7.35 lakh people from 1,597 villages have been inundated by the surging waters.
The situation in the state remained grim on Monday.
The flood situation remained critical in Assam with 30 more villages reeling under water on Tuesday, taking the total number of affected people in this season to around 1.1 lakh in 11 districts.
Army Chief General Dalbir Singh Suhag will hold a closed-door strategy meeting with senior army officials in Guwahati to review the prevailing situation in Assam where 81 people have been killed following attacks by NDFB(S) militants.
The monsoon spelt mayhem in several parts of the country on Monday, particularly Mumbai where local train services and flight operations were hit and everyday life disrupted as well as Assam that was grappling with floods yet again.
The worst affected districts are Lakhimpur, Golaghat, Bongaigaon, Jorhat, Dhemaji, Barpeta, Goalpara, Dhubri, Darrang, Morigaon and Sonitpur
While the flood waters receded in Bongaigaon and Sivsagar districts of Assam, fresh inundation occurred at a dozen villages in Nagaon even as four districts continued to reel under the impact of floods on Sunday.
With two more deaths, the fatalities due to flood this year has gone up to 18.
The deluge, which had affected 2.5 lakh people in 11 districts on Wednesday, spread to six more districts on Thursday affecting 4.23 lakh people, it said.
The ASDMA said more than 4.87 lakh people are currently suffering in Lakhimpur, Jorhat, Golaghat, Cachar, Dhemaji, Biswanath, Karimganj, Sonitpur, Majuli, Barpeta, Nagaon, Nalbari, Sivasagar, Morigaon and Chirang districts.
Nearly four lakh people have been affected across seven districts of Assam.
Normalcy is returning to the violence-affected districts of Baksa and Kokrajhar under Bodoland Territorial Autonomous Districts Council areas in Assam. The state government claims that there has been no incident in the last 48 hours as the security apparatus along with army is working relentlessly to restore peace.
The flood situation in Assam worsened on Saturday with four more deaths reported and over 6.5 lakh people being affected in more than 1,400 villages due to incessant rains across the state.
Dhubri is the worst hit with over 8.72 lakh people affected, followed by Barpeta with more than 4.78 lakh people and Goalpara with around 4.28 lakh population.
Currently, the Brahmaputra at Guwahati, Nimatighat in Jorhat, Tezpur in Sonitpur, Goalpara and Dhubri towns, while the Barak at AP Ghat in Cachar and Badarpurghat in Karimganj are flowing above the danger mark.
Uttarakhand Chief Minister Pushkar Singh Dhami on Monday visited the Silkyara-Barkot tunnel site for a review of the rescue operations being carried out there to evacuate 40 labourers trapped inside since Sunday morning following its partial collapse.
The Election Commission has decided to set up a panel to identify the experiences and shortcomings during the recently-held five assembly polls.
The flood situation in Assam remained grim after fresh heavy rainfall in Meghalaya's Garo hills and Goalpara district as the death toll mounted to 40.
People spent a sleepless night as a series of aftershocks shook Assam after a strong 6.4 magnitude earthquake caused extensive damage to buildings.
Apprehending trouble in the state especially in violence-affected Bodoland Territorial Autonomous District Council areas in the aftermath of declaration of results of election in the state on Friday, the Assam government has requested the army to be in stand by for quick deployment, if the need arises while helicopter surveillance is being continued in vulnerable areas of the violence-affected BTC areas and along India-Bhutan border.
Rescuers at the under-construction tunnel collapse site in Uttarkashi on Tuesday initiated the process of inserting large-diameter mild steel pipes through the rubble using an auger machine to rescue the 40 workers trapped for two days now, officials said.
At least 15 people have died in heavy floods and landslides triggered by continuous rain for the last three days in Assam, where airforce helicopters, army, National Disaster Response Force and State Disaster Response Force have been pressed into service for rescue work, officials said.
In Uttar Pradesh, southwest monsoon has been normal so far where rains and thundershowers occurred in few places since Friday.
With the recovery of four more bodies today, the death toll mounted to 36 in Assam floods that affected about 10 lakh people in 13 districts and rendered majority of them homeless.
In the Northeast, while three people died in Assam, two each lost their lives in Arunachal Pradesh and Mizoram in rain-related incidents.
The flood situation remained critical in Assam, affecting 7.35 lakh people in 18 districts where one lakh hectares of cropland have been inundated by the surging waters of the swollen Bahmaputra and its tributaries.
An alert has been sounded across Assam as cyclone 'Mahasen' is likely to hit the northeastern states on Thursday night, officials have said. All boats and ferry services on Brahmaputra have been closed for the next three days and fishermen have been directed not to venture out to the river.
The apex court said this while dealing with an application filed by the Assam which had sought a clarification whether each of the children of the deceased parents would be provided ex-gratia payment of Rs 50,000, in case there is more than one child.
While incessant rain in the past 24 hours has wreaked havoc in parts of the northeast, triggering flash floods, the national capital experienced one of its hottest days.
'The prime minister expressed concern and assured all possible help to the state,' CMO said.
The death toll in Assam in the current flood rose to 30 on Wednesday with 14 bodies recovered from worst-affected Goalpara and Kamrup (rural) districts even as relief and rescue work continued round-the-clock.
With the fresh fatalities, the total number of people losing their lives in this year's flood and landslides across the state has gone up to 42.