The Met Office in a special bulletin on Friday warned that coastal areas of the country might be swept by a wind-driven surge of 5-7 feet high above the normal tide.
Barguna correspondent of bdnews24.com reported that at least two people had died being hit by the flying scraps of tin-shed houses flung by wind-packed storms.
Some 140 fishermen who remained missing since Wednesday in the Bay of Bengal were yet to be located.
The Met Office has advised cautionary signal no. 3 along the coastal areas as the depression over northwest bay has moved northeastwards and now lay over the northwest parts of the bay and adjoining coasts of Bangladesh and West Bengal.
According to the Met Office observation at 9am on Friday, the storm laid about 610 kms southwest of Chittagong port, 585 kms southwest of the Cox's Bazaar port and 420 kms southwest of the Mongla port (near lat 19.6° n & long 87.0° e).
The storm is likely to intensify further and move in a north-northwesterly direction. Under its influence steep pressure persisted over northern part of the bay.
Squally weather might affect the maritime ports and coastal areas of the country, the met office warned.
Maximum wind speed within 44 kms of the depression centre is about 40 kph rising to 50. Sea will remain rough, the forecast added.
Under the influence of depression and the new moon phase, the low-lying areas of the coastal districts of Cox's Bazaar, Chittagong, Noakhali, Feni, Laxmipur, Bhola, Barisal, Patuakhali, Borguna, Chandpur, Pirozpur, Jhalokathi, Bagerhat, Khulna, Satkhira and the off-shore islands are likely to be inundated by wind-driven surge.
All fishing boats and trawlers over northern part of the bay and deep sea have been advised to keep alert and remain in shelter until further notice.
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