Suburban trains on both the Western Railway and Central Railway are running at reduced speeds due to water logging on the tracks.
According to Central Railway 6 trains have been terminated while 6 others have been cancelled.
Rail traffic has been suspended beyond Ambernath and on Harbour line as water crosses 18 inch above rail level.
Met Department predicted heavy to very heavy rainfall for today and tomorrow.
City has received 91 percent of its required monsoon rainfall till now.