Normal life has been paralysed in Mumbai and adjoining areas since last night, with road, rail and air services being badly affected due to heavy showers.
"Spoke to Maharashtra CM @Dev_Fadnavis on the situation arising due to incessant rain in Mumbai & surrounding areas," Modi tweeted.
"Centre assures all possible support to the government of Maharashtra in mitigating the situation due to heavy rains in parts of the state," he added.
Indian Metereological Department (IMD) has predicted more rainfall.