The administration has set up relief camps and warned that the flood could increase in the coming days in view of the back flow of Brahmaputra into its tributary, Jinjiram, district officials said.
"Incessant rains in the past few days and the back flow of Brahmaputra has affected 43,200 people in Selsella Community and Rural Development block," district Deputy Commissioner Pravin Bakshi said.
10,800 households in 86 villages were affected after which, 21 relief camps have been set up at different locations, he said.
Sangma said all gram sevikas have been asked to assess the damage and a detailed report from Trikikilla block was awaited.