Low-lying areas in some eastern and north-eastern areas might witness brief flooding by June 20 because of the very heavy rainfall likely to continue over vast swathes of land in Bangladesh and its adjacent upstream areas in India.
The Flood Forecasting and Warning Centre on Tuesday afternoon forecast that the rivers of Muhuri, Sarigowain, Jadukata and Someswari might flow at their danger marks during the forecast period till June 20.
Low-lying areas in Feni, Sylhet, Sunamganj and Netrakona districts are at risk of going under water.
Bangladesh is witnessing intermittent light to moderate rainfall since June 15 due to active monsoon and the wet spell is likely to intensify following the formation of a low pressure area in the south-western Bangladesh and its adjacent areas.
On Tuesday, the BMD said, Bangladesh鈥檚 highest maximum rainfall of 118mm, in the 24 hours until 6:00pm, was recorded at Sitakunda in Chattogram.
Most of Bangladesh is likely to receive light to moderate rainfall amidst thunderstorms today and next three days, the BMD said in a forecast issued at 6:00pm Tuesday.
Potential heavy to very heavy rainfall may cause landslides in Chattogram, Rangamati, Bandarban, Khagrachari and Cox鈥檚 Bazar, the BMD said.
Temporary waterlogging may also occur in Dhaka and Chattogram metropolitan areas, it also said.
Thunderstorms, accompanied by gusty wind, reaching up to 60kmph might occur over large parts of the country, prompting the BMD to issue Signal Number One for all river ports.
The active monsoon and thunder clouds lying over the north Bay of Bengal and adjoining coastal areas in the country might also leave the sea rough, the meteorological office said.
All four maritime ports have been asked to hoist cautionary Signal Number Three and all fishing boats and trawlers were asked to remain close to the coast and proceed with caution until further notice.
This is the second significant spell of rain since the monsoon onset in late May, earliest in the last four decades.
Dhaka recorded 38mm rainfall in the 24 hours until 6:00pm Tuesday.
The flood forecasting centre also warned that rivers in the country, particularly in south-eastern, eastern and north-eastern regions, might as well rapidly swell during its forecast period until June 20.
