The prime minister said the central government has been closely and constantly monitoring the flood situation in Assam.
"PM @narendramodi spoke to Assam CM @sarbanandsonwal yesterday & today regarding the flood situation in the state," the PMO tweeted.
"All possible support is being provided to Assam for overcoming the flood situation prevailing in parts of the state," Modi said.
The flood situation in Assam has deteriorated, with at least 99 people dying and 22.5 lakh being affected in 21 districts, according to officials.
Sonowal yesterday informed the prime minister about the devastation caused by the flood in middle and upper Assam and the disruption to vehicular movement on National Highway 37, the lifeline between the two areas, a state government spokesman had said yesterday.
Principal Secretary to the prime minister Nripendra Mishra has asked Assam Chief Secretary V K Pipersenia to submit a report detailing the damage and devastation caused by the current wave of floods in the state.