Early estimates put the damage from Pakistan's recent deadly floods at more than $10 billion, its planning minister said on Monday, adding the world has an obligation to help the South Asian nation cope with the effects of man-made climate change.

Unprecedented flash floods caused by historic monsoon rains have washed away roads, crops, infrastructure and bridges, killing at least 1,000 people in recent weeks and affecting more than 33 million, over 15% of the country's 220 million population.

The climate change minister has called the situation a "climate-induced humanitarian disaster of epic proportions." 

"I think it is going to be huge. So far, (a) very early, preliminary estimate is that it is big, it is higher than $10 billion," Ahsan Iqbal told Reuters in an interview.

"So far we have lost 1,000 human lives. There is damage to almost nearly one million houses," Iqbal said at his office.

"People have actually lost their complete livelihood."

Iqbal rated the recent floods worst than those that hit Pakistan in 2010, for which United Nations (UN) had issued its largest ever disaster appeal.

A woman taking refuge is seen with her belongings, following rains and floods during the monsoon season in Sohbatpur, Pakistan August 29, 2022. Photo: Reuters

The minister said it might take five years to rebuild and rehabilitate the nation, while in the near term it will be confronted with acute food shortages.

To mitigate food shortfalls, Finance Minister Miftah Ismail said the country could consider importing vegetables from arch-rival India. 

The two neighbouring countries have not had any trade for a long time.

"We can consider importing vegetables from India," Ismail told local Geo News TV, adding other possible sources of food imports included Turkey and Iran.

Food prices have already shot up due to flooded crops and impassable roads.

India Prime Minister Narendra Modi said he was saddened by the devastation caused by the floods.

Historic monsoon rains and flooding in Pakistan have affected more than 30 million people over the last few weeks

A man walks with a bicycle in flood water following rains and floods during the monsoon season in Nowshera, Pakistan August 29, 2022. Photo: Reuters

Climate change victim

Social media users posted videos showing stranded people and whole families washed away by floodwater. Reuters was unable to independently verify the footage.

Southern, southwestern and northern Pakistan have been the hardest hit by the floods, which have swept large swaths of farmland and stored crops, also isolating the regions from rest of the country for the last several days.

Tens of thousands of families have left their homes for safer places, moved in with their relatives, or to state-run camps, while others have been spending nights in the open, waiting for help including tents, food and medicine.

Pakistan has appealed for international help and some countries have already sent in supplies and rescue teams.

The nation's foreign minister told Reuters on Sunday he hoped financial institutions such as the International Monetary Fund would provide financial aid, taking the economic cost of the floods into account.

A man stands amid belongings as he clears his house, following rains and floods during the monsoon season in Charsadda, Pakistan August 29, 2022. Photo: Reuters

However, Iqbal said any formal requests for financial help would need to wait until the scale of the damage was known, something Pakistan was now evaluating with partners, including the World Bank and the Asian Development Bank.

The Chinese government said on Monday it will provide additional humanitarian aid, including $300,000 in cash and 25,000 tents. China had already sent 4,000 tents, 50,000 blankets and 50,000 waterproof tarps to Pakistan.

China's President Xi Jinping also called his Pakistani counterpart Arif Alvi to express his condolences on the severe flooding, according to Chinese state media.

The Canadian government on Monday announced $5 million in funding for humanitarian assistance to Pakistan to deal with the flooding.

Iqbal also said the world owed Pakistan, which was a victim of climate change caused by the "irresponsible development of the developed world."

Men walk along a flooded road with their belongings, following rains and floods during the monsoon season in Sohbatpur, Pakistan August 28, 2022. Photo: Reuters

"Our carbon footprint is lowest in the world," he said. "The international community has a responsibility to help us, upgrade our infrastructure, to make our infrastructure more climate resilient, so that we don't have such losses every three, four, five years," he said.

"Those areas which used to receive rainfall aren't receiving rainfall and those areas which used to receive very mild rains are receiving very heavy rainfall," he added.

Iqbal said 45% of cotton crops had been washed away with early wheat sowing in southern Pakistan also affected, as large swaths of land remained inundated with flood water, and severe damage to rice fields as well as vegetable and fruit crops.

Pakistan's finance ministry in its latest economic outlook update has warned of the impact on critical seasonal crops, particularly cotton, which is key for Pakistan's textile sector that makes up more than 60% of the country's exports.

Analysts say the impact could be devastating for the country, which was already in the midst of an economic crisis, faced with high inflation, a depreciating currency and a current account deficit.

The IMF on Monday approved long awaited over $1.1 bln in bailout funds to resume a programme that had been stalled since early this year.

People are seen outside their flooded house, following rains and floods during the monsoon season in Sohbatpur, Pakistan August 28, 2022. Photo: Reuters