A landslide near suburban Kandivali disrupted vehicular movement from western suburbs towards south Mumbai, the official said.
Traffic movement from Byculla to South Mumbai was also affected due to inundation at some places.
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The Santacruz observatory in western suburbs recorded 254 mm rainfall since Monday night while the Colaba observatory in south Mumbai recorded 220 mm rain during the same period, India Meteorological Department (IMD), Mumbai, Deputy Director General K S Hosalikar said.
Heavy rainfall trend would continue for the next 48 hours, a BMC official confirmed to PTI.
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The BMC has deployed high capacity water pumps to discharge water from streets in Byculla, Bhandup and some other areas.
Mumbai Police has asked people to dial 100 in case of emergency.