Government primary and secondary schools will be closed from Apr 21 to Apr 27
Meteorologist Muhammad Abul Kalam Mallik said the rains may cause more landslides in the hills of the two divisions.
The Met office said in its forecast for Saturday that light to moderate rain or thunder showers accompanied by temporary gusty or squally wind is likely to occur at most places over Khulna, Barisal, Chittagong and Sylhet divisions.
Mallik said the rains may continue until Monday.
At least 156 people have died in Rangamati, Chittagong, Cox's Bazar, Bandarban and Khagrhachharhi in landslides triggered by rains from Monday night.