( CNN ) -- Cleanup efforts unfolded Monday in Pakistan 's largest city , Karachi , after torrential monsoon rain over the weekend killed dozens , cut power to 15 million and broke a 32-year record . Pakistanis push a stranded auto-rickshaw along a flooded street in Karachi on Sunday . Officials combed the city looking for bodies . The health department confirmed 32 deaths and said it received reports of more . `` Most of them are either from drowning or they were deaths when the walls or roofs of their houses collapses , '' said Dr. A.D. Sajnani of the health department . `` The entire city is disrupted , '' said Muhammad Aly Balagamwala , a Karachi businessman . `` Most places lost power for 28 to 30 hours , and some are still without power . The rain flooded offices . We lost water . Everything is shut down . '' Many residents took to the streets to protest the massive power outage in the southern city . They threw rocks at the offices of the power company and burned tires . `` I guess there comes a point you just snap and you ca n't take it anymore , '' Balagamwala said . `` To the credit of the government , a lot of cleanup work has been done since last night . '' The rain began Friday night , and by Sunday the city had received almost 9 inches ( 22.9 cm ) , the most since 1977 , said Mayor Syed Mustafa Kamal . Storm drains overflowed , water-logging streets and alleyways . Monsoon rains sweep across the subcontinent from June to September . While they bring much-needed relief to often-parched farmlands , they also leave a trail of landslides , home collapses and floods that sometimes claim dozens of lives .
By Sunday , Karachi had received almost 9 inches ( 22.9 cm ) of rain , mayor says . Score: 6 Deaths mostly from drowning , wall or roof collapses , health department official says .