Rescuers and residents resumed searching on Tuesday for survivors as the death toll from five days of torrential rain rose to almost 400, with authorities warning monsoon downpours would continue until the weekend.

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,

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.

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

Pakistan ordered businesses, schools and public offices in Karachi to shut on Wednesday after torrential monsoon rain left at least 10 people dead in the densely populated port city, with more heavy downpours predicted.

The Tribune, now published from Chandigarh, started publication on February 2, 1881, in Lahore (now in Pakistan). It was started by Sardar Dyal Singh Majithia, a public-spirited philanthropist, and is run by a trust comprising five eminent persons as trustees.

Severe monsoonal flooding has caused widespread devastation across Pakistan, destroying homes and sweeping away entire villages.

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 been grappling with widespread torrential rains in almost all parts of the country that have wreaked havoc and left over 700 people dead and hundreds injured. The deluge crippled the already dilapidated infrastructure, damaging houses, roads, and commercial centres.

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

The death toll in the flood-ravaged province of Pakistan's Khyber Pakhtunkhwa (KP) has surged to 365, as torrential rains and flash floods continue to batter the region, with new casualties and destruction reported across several districts.