Noting that 235 millimetres of rain occurred in only Manghopir in 12 hours yesterday, Wahab stressed that Karachi’s nullahs had a capacity of 40mm so rainfall above that would result in a spillover effect. He asserted that a nullah situated in the Nursery area was fully functional and had no blockage.

More than 20 people have died on Wednesday in a torrential spell of monsoon rain in Pakistan, where downpours have swept away entire villages over the last week, killing more than 400.