Prime Minister Muhammad Shehbaz Sharif on Saturday will visit Faqirani Jat, Oplano and other flood-affected areas of District Sajawal in Sindh province.
The prime minister will review the rescue and relief activities and meet the flood affectees.
The chief secretary, director general provincial Disaster Management Authority, deputy commissioner and other relevant authorities will brief the prime minister on the relief operations, flood situation and rehabilitation of the damaged infrastructure.
At least 15 bridges and hundreds of houses have been washed away over the past 24 hours in the two provinces, according to the reports.
Fresh rains and floods have halted rail and road travel between dozens of districts in the two provinces, including the capital of Balochistan, Quetta, and the rest of the country.
The telecommunication system has also been badly affected in scores of districts and towns, with cellular and landline telephone services remaining out of order.
Balochistan Senator Samina Mumtaz told reporters that several districts in the floods-battered province are reeling from serious food shortages.
In Sindh, fresh floods caused by the latest torrential downpours inundated several major highways, including the main Indus Highway, hampering the relief efforts.
In several farther parts, army and air force planes are the only source of delivering food, water bottles, and medicines to the marooned people.
The northern and southern districts of the northwestern Khyber Pakhtunkhwa province, which borders Afghanistan, were added to the list after massive downpours along with flash floods swollen rivers, swept through houses, buildings and roads, and triggered landslides.
The scenic Swat valley and adjoining Dir, and Buner districts are the hardest hit as well as the southern district of Dera Ismail Khan.
APP with additional input from GVS News Desk