Mumbai: Heavy rain since early morning on Friday affected railway and bus services in Mumbai, causing inconvenience to lakhs of office-goers. Incessant rain with intermittent heavy spells led to waterlogging on some roads and railway tracks, slowing down the public transport services. The suburban trains, considered Mumbai's lifeline, are running at least 15 to 20 minutes late, said commuters. A railway official said water has accumulated on tracks at Chunabhatti on the Harbour line due to heavy showers coupled with high tide. Services on the Main line of the Central Railway were delayed due to a technical glitch in a train engine, officials said. In the 24 hours ending at 8 am, Mumbai recorded an average rainfall of 78 mm. The figure for eastern Mumbai and western Mumbai was 57 mm and 67 mm rainfall, respectively, a civic official said.