Mr Rijiju, along with a central team, visited the deluge- affected Aalo area in West Siang district and assessed the situation in villages there.
The minister of state for home met the farmers who have lost their standing crops, houses and family members, and listened to their grievances in the presence of district management.
"I assure you all possible help from the state as well as from the Centre. Due to very bad weather, sometimes it becomes difficult to visit each and every area to assess the damage but the government has been monitoring the situation very closely and no one would be left behind," he said.
Mr Rijiju also talked to senior officials of the district management and took stock of their response and preparedness.
He asked authorities to expedite the distribution of medicines to the villagers as there was a looming threat of a malaria outbreak.
Farmers, who had gathered in a large number, personally briefed the minister about the entire situation and sought relief.
"I want to assure the farmers that they would be compensated by the government for their damaged crops. The Centre as well as the state government is looking into the loss," he said.
The minister said he has asked the administration to prepare a detailed report of the damage so that further assistance could be provided soon.
"The Centre released funds for the state government day before yesterday. The state government is also working round the clock with authorities to restore roads, connectivity and essential supplies as landslides and rains have caused heavy damage. I am personally visiting the farmers so that the ground situation can be assessed," he said.
Mr Rijiju asked the villagers that in this difficult time, the government was with them as he oversaw relief operations in affected areas in the entire region.
Several major roads in Arunachal Pradesh have been damaged due to landslides with district officials working round the clock to restore the roads.
Floods and landslides triggered by incessant rain last week have completely cut off many district headquarters in the state from the rest of the country, officials said.
The state capital was virtually cut off with its lifeline NH 415 getting washed away at the entry point, while the alternate road via Jullang remained blocked leaving only one road open through Hollongi en route Lakhimpur district in Assam, they said.
Mr Rijiju has asked the district authorities to submit a detailed report of loss and damage so that further action can be initiated accordingly.
Major rivers in the state are still flowing above the danger level while surface communication was disrupted at many places along the NH-415 that links Assam with Arunachal Pradesh, officials said.
Officials said 15 granaries and several houses have been inundated by waters of Yomgo river while a poultry farm was also badly affected.
Prime Minister Narendra Modi has also spoken to Arunachal Pradesh Chief Minister Pema Khandu over phone and assured all possible support from the Centre and said that the country is with the state during these trying times.
Mr Rijiju is accompanied by Vikram Singh Gaur, Joint Secretary (Niti Aayog); L Ravi Joseph, IG, NDRF; Ravinder Singh, Consultant (Landslide & Avalanche), NDMA; and Gopi Chandra Chhawaniya, Director, MHA.