Mumbai, July 4 -- After Friday's heavy showers left several roads waterlogged across the city, the India Meteorological Department (IMD) has issued a red alert for Mumbai, Thane and Palghar for Saturday and Sunday, warning of heavy to extremely heavy rainfall as active weather systems strengthen over Maharashtra. According to the IMD, rainfall activity is expected to remain intense between July 4 and July 7 due to an off-shore trough extending from the Maharashtra to Karnataka coast, a low-pressure area over the northwest Bay of Bengal that is likely to intensify over the next two days, and a shear zone over central India. For the next 48 hours, the weather agency has forecast generally cloudy skies with spells of rain and heavy to very heavy rainfall in several areas. The city was placed under an orange alert on Friday and witnessed heavy showers. Rainfall intensified by mid-morning after a relatively quiet start to the day. On Friday, Santacruz recorded 205 mm of rain, while Colaba received 158 mm. Heavy rain caused temporary waterlogging at several locations. The BMC said dewatering pumps and manual labour were deployed to clear flooded stretches. Despite the rain, suburban train services on the Central and Western Railway lines and road traffic remained largely unaffected.htc...