The flood situation in 33 districts of the country started improving amid decline in rain and river current over last two days.
However, outbreak of waterborne diseases has also increased with receding of water, according to the health ministry.
A total of 5.7 million people have been marooned, 170 died so far in the 43-day long flood that hit more than half of the country.
70,000 people are still in government flood and cyclone centres with 150,000 cattle and birds, according to the disaster management and relief ministry.
Health ministry report said outbreak of diarrhea has risen with receding of flood water with 10,000 people being affected with the disease so far of which 1800 cases were found just in last three days.
One person has died so far by diarrhea during the period.
6,156 persons have contracted various skin diseases amid use of polluted flood water, said health ministry.
However, flow in the major river basins including the Jamuna-Brahmaputra, the Padma-Ganges, Upper Meghna were showing a declining trend which might continue for next year three days, according to the Flood Forecasting and Warning Centre (FFWC).
Flood conditions in Bogura, Sirajganj, Tangail, Manikganj, Jamalpur, Dhaka, Narayanganj, Munshiganj, Madaripur, Faridpur, Shariyatpur and Rajbari might show gradual improvement over next three days starting from Saturday evening, said FFWC.
Water from the inundated area within the Dhaka City Corporations might also decline during the period, said FFWC.
Twelve rivers in 19 stations rose while other rivers in 79 points have declined on Saturday.
Meanwhile weather of the Dhaka city remained humid and hot also on Saturday amid mercury rose further.
Maximum temperature of the city was recorded at 34.3 degree Celsius on the day while humidity was 83 per cent.