Meanwhile, Bangladesh army, navy, coast guard, police, and Border Guard Bangladesh are working round the clock to rescue the flood-hit people.
According to the Bangladesh Water Development Board, flood water entered 40 points of Zakiganj upazila till Wednesday evening.
Around 60 per cent of Fenchuganj and Balaganj went under water. Road communication on Balaganj-Khichripur and Fenchuganj-Balaganj route remained suspended.
The flood situation in Beani Bazar, Osmaninagar, Balaganj, and Gopalganj also worsened as new areas of the upazilas went under water as the water level in the River Kushiara kept rising.
SM Shahidul Islam, chief engineer of the Bangladesh Water Development Board in Sylhet, said water in the River Surma was flowing at 13.75 centimetres above the danger mark at Kanaighat point Wednesday evening.