Floods kill another 24 in Pakistan, death toll reaches 1,314

Devastating flash floods have washed away roads, homes and crops - leaving a trail of deadly havoc across Pakistan.

Another 24 people lost their lives over the past 24 hours, pushing the overall tally to 1,314, the country's national disaster agency said on Sunday.

"It's all one big ocean, there's no dry land to pump the water out," Sherry Rehman said, calling it a "crisis of unimaginable proportions."

A total of 12,703 people have been injured across the country in rain and flood-related incidents since June 14.

The summer rain is the heaviest recorded in a decade and is blamed by the government on climate change.

"Literally, one-third of Pakistan is underwater right now, which has exceeded every boundary, every norm we've seen in the past," Ms Rehman told AFP news agency.

"We've never seen anything like this," the minister added.

Pakistan's Foreign Minister Bilawal Bhutto-Zardari said one-third of those killed are believed to be children.

"We're still coming to grips with the extent of the damage," he added.

Officials estimate that more than 33 million Pakistanis - one in seven people - have been affected by the historic flooding.