Flood situation in several districts across the country deteriorated due to the continuous swelling of major rivers amid heavy rainfall as well as onrush of upstream water.
Flood Forecasting and Warning Center (FFWC), however, forecasted a moderate to severe flood in rest of this month in Northern, North-Eastern, Central and some Southern regions.
However, shortage of food and sanitary aids put thousands of marooned people in great difficulties.
Fresh areas in Nilphamari, Lalmonirhat, Jamalpur, Kurigram , Sylhet, Sunamganj, Natore and Sathkhira were inundated further due to overflow of major rivers on the day.
Because of heavy rainfall and upstream water from bordering areas, the water flow of three major river basins — Brahmaputra-Jamuna, Padma-Ganges and Upper Meghna increased alarmingly on the which might continue for next 72 hours, said Md Arifuzzaman Bhuiyan of FFWC.
Flood situation might worsen further in the Nilphamari, Lalmonirhat, Rangpur, Jamalpur, Kurigram , Gaibandha, Bogra , Sylhet, Sunamganj, Natore and Netrokona districts by Monday, he said.
Ten major rivers were flowing above the danger level while the water levels at 76 river stations across the country marked a rise on Sunday, according to FFWC.
The huge onrush of river water damaged numerous houses, crops, communications infrastructures, educational institutions and other establishments in 19 flood affected districts so far.
Rainfalls were recorded as 150 mm in Sunamganj, 148mm at Lalakhal, 121mm in Thakurgaon, 108mm in Kamolganj, 104mm at Manurailway bridge, 98 mm in Moulovibazar, 95mm in Sylhet and 92mm at Lorergar in Sunamganj from Saturday 9.00 am to Sunday 9.00 am, FFWC said.
The rainfalls in the upstream of India were 266cm at Cherrapunji, 244mm Shiliguri, 162mm in Coch Bihar, 128mm at Koilashar and 145mm in Jalpaiguri during the period, FFWC said.
Swelling rivers caused thousands of people to move away from their homes in complete absence of any government assistance to help them evacuate from remote low-lying areas.
The Jamuna, Surma, Jadukata and Someswari swelled rapidly as well, flowing up to nearly a meter above the danger level as FFWC forecasted for a severe deluge in the regions in next three days.
Official estimate showed 25,950 people left their homes on Sunday with 17,550 of them seeking shelter at education institutions opened as flood shelters in Rangpur, Kurigram, Gaibandha, Nilphamari and Lalmonirhat districts.
Many of them lost their valuables during crossing flood water, said sources.
However, a total of 1.75 million people have been marooned in 19 districts so far by flood that started from the last week of June, according to the Bangladesh Water Development Board (BWDB).