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.

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

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