Mumbai Rain Alert: IMD Issues Orange Alert For Sept 27 (canva, representational)Mumbai Weather : After a few days of relatively calm showers, Mumbai and its neighbouring districts are gearing up for a fresh spell of heavy rain. The India Meteorological Department (IMD) has issued an orange alert for September 27, warning of heavy to very heavy rain at isolated places across Mumbai, Thane and Raigad. Mumbai IMD Weather ForecastAccording to the IMD, the rain is expected to remain light to moderate on September 24 and 25, accompanied by thunderstorms in some parts of the city. Depending on its path, Mumbai and adjoining areas could be in for a heavy deluge between September 27 and 29. What an Orange Alert MeansAn orange alert from the IMD indicates the likelihood of heavy to very heavy rain at isolated places, which may lead to waterlogging, traffic disruption and local train delays—issues Mumbaikars are all too familiar with.