More than 10,000 people of 23 villages in the char areas of Teesta and Dharala rivers in Lalmonirhat district are trapped in flood water following onrush of water from upstream hilly areas.
The Teesta River, sharing borders with India, was flowing 8 cm above the danger level at Doyani point on Tuesday morning.
The officials of Bangladesh Water Development Board (BWDB) said the situation worsened as India opened the sluice-gates of the Gazaldoba barrage.
Meanwhile, 44 gates of the Teesta Barrage have been opened to control the flow of water.
Other than that, the temporary dams in Dhurni village of Hatibandha upazila are now at risk, said BWDB officials.
The water level started to rise from Monday morning and the condition is being worsened gradually, according to locals.
BWDB Executive Engineer Rafiqul Alam Chowdhury of Teesta Barrage Irrigation Project said the situation will be worsened more if the onrush of water from upstream hilly areas continues.