At least 21 people have died in monsoon rain-related incidents in Pakistan, authorities said, pushing the nationwide death toll over the last week above 400 as floods and landslides continue to devastate large parts of the country.

The Prime Minister assured the flood affectees of the Federal Government and Pakistan Army's unwavering commitment to extend maximum support in this critical hour.

Flash floods triggered by cloudbursts in the mountainous northwest have brought destruction since Friday in the worst spell of this year's monsoon.

Pakistan has received higher-than-normal monsoon rainfall this year, triggering floods and mudslides that have killed more than 540 people since June 26.

A deluge of rain triggered floods and landslides, sweeping people away and flooding and destroying homes, officials said.

Pakistan declared a public holiday in Karachi on Wednesday as the financial capital braced for more rain, after the arrival of the annual monsoon season left at least 7 people dead and caused widespread flooding,

Across Pakistan, monsoon rains that began in late June have been heavier than usual, killing at least 645 people. Four hundred of those deaths were in the northwest alone, where narrow valleys and river-carved gorges funnel rainwater into sudden torrents.

More than 20 people have died in a fresh spell of monsoon rain in Pakistan, the country’s disaster management agency said on Wednesday. Torrential downpours across Pakistan over the past week have caused flooding and landslides that swept away entire villages,