The UN is appealing for $160m (£136m) in emergency funding to help Pakistan deal with devastating floods.
More than 1,150 people have been killed and nearly half a million displaced in the disaster.
“Pakistan is awash in suffering,” UN Secretary General Antonio Guterres said in a video message for the launch of the appeal.
The floods have affected more than 33 million people, or one in seven Pakistanis.
Pakistani authorities, supported by the military, rescuers and volunteers, have been battling the aftermath of the floods.
Although rain stopped three days ago and floodwater in some areas were receding, large areas remain underwater.
Rescue workers were evacuating stranded people to safer ground, including makeshift tent camps that have sprung up along motorways, villages and towns.
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According to initial estimates by the government, the devastation has caused $10m (£8.5m) of damage to the economy, however, the planning minister, Ahsan Iqbal, said this was a preliminary estimate and the actual cost will be “far greater”.
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On Monday, the International Monetary Fund’s executive board approved the release of $1.17bn £1bn for Pakistan.
It is part of a bailout accord the IMF and Pakistan signed in 2019, but the release of a $1.17bn tranche had been put on hold this year after the IMF raised concerns about Pakistan’s compliance with the deal’s terms under Imran Khan’s government.
Last week, the UN allocation $3m (£2.5m) for aid agencies and their partners to respond to the floods, with the money used for health, nutrition, food security, water and sanitation services.
Pakistan’s climate minister, Sherry Rehman said on Monday that new monsoons were expected in September.
While monsoons are common at this time of year in the region, they hit earlier than usual in Pakistan, according to officials.
The massive rainfall last week affected nearly the whole country, and while Pakistan is used to monsoon rains and flooding, Ms Rehman said, but not like this.
The flooding has the hallmarks of a natural disaster fuelled by climate change, but it is too early to assign blame on global warming, experts said.
“This year, Pakistan has received the highest rainfall in at least three decades. So far this year the rain is running at more than 780% above average levels,” said Abid Qaiyum Suleri, executive director of the Sustainable Development Policy Institute and a member of Pakistan’s Climate Change Council.
“Extreme weather patterns are turning more frequent in the region, and Pakistan is not an exception.”
Pakistan saw similar flooding and devastation in 2010 that killed nearly 2,000 people, but the government did not implement plans to prevent future flooding by preventing construction and homes in flood-prone areas and river beds, said Mr Suleri.
Floods and monsoon rains have damaged one million houses and affected 33 million people and reflects how poorer nations can often pay the price for climate change largely caused by more industrialised nations.
Since 1959, Pakistan has been responsible for only 0.4% of the world’s historic CO2 emissions, while the US is responsible for 21.5%, China for 16.5% and the EU 15%.
According to the National Disaster Management Authority, at least 498,000 people in the country of 220 million are in relief camps after being displaced.
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Many more displaced victims are believed to be living with relatives, friends or out in the open, without shelter.
Pakistan started receiving international aid this week, and more planes carrying aid from Turkey and the United Arab Emirates landed at an airport near Islamabad on Tuesday, according to a statement released by the military.
It said Chinese planes carrying aid will arrive later on Tuesday and 6,500 Pakistani military personnel have been deployed to help authorities in rescue and relief operations.
