The Indus River, which runs along the length of the South Asian nation, is threatening to burst its banks as torrents of water rush downstream from its tributaries in the north.
Pakistan as a whole had been deluged with twice the usual monsoon rainfall, the meteorological office said, but Balochistan and Sindh provinces had seen more than four times the average of the last three decades.
INTERNATIONAL HELP
The disaster could not have come at a worse time for Pakistan, where the economy is in free fall.
Appealing for international help, the government has declared an emergency.
Aid flights have arrived in recent days from Türkiye and the UAE, while other nations including Canada, Australia and Japan have also pledged assistance.
The United Nations has announced it will launch a formal $160 million appeal on Tuesday to fund emergency aid.
Pakistan was already desperate for international support and the floods have compounded the challenge.
Prices of basic goods -- particularly onions, tomatoes and chickpeas -- are soaring as vendors bemoan a lack of supplies from the flooded breadbasket provinces of Sindh and Punjab.
There was some relief on Monday when the International Monetary Fund approved the revival of a loan programme for Pakistan, releasing an initial $1.1 billion.
Makeshift relief camps have sprung up all over Pakistan -- in schools, on motorways and in military bases.
In the northwestern town of Nowshera, a technical college was turned into a shelter for up to 2,500 flood victims.
They sweltered in the summer heat with sporadic food aid and little access to water.
"I never thought that one day we will have to live like this," said 60-year-old Malang Jan.
"We have lost our heaven and are now forced to live a miserable life."
