Multiple operators, including the State-run BEST, Adani Electricity and Tata Power supply power to the city.

Several parts of Mumbai and Mumbai Metropolitan Region witnessed massive power outage on Monday, resulting in suspension of suburban train services.
The reason for power outage is cited as multiple trippings of power lines supplying power to Mumbai and MMR. It has been reported that nearly 360 MW of power supply has been affected.
In a tweet, Brihanmumbai Electricity Supply and Transport (BEST) said, “the electric supply is interrupted due to TATAs incoming electric supply failure.”
Western Railway, on Twitter, said that services between Churchgate and Borivili have been suspended due to “grid failure of Tata Power Company”. The services will resume as soon as traction power supply is restored, it said.
Multiple operators, including the State-run BEST, Adani Electricity and Tata Power supply power to the city.
In a statement, Adani Electricity said that there is a major power grid failure due to which supply is affected in most areas of Mumbai. “As per grid safety protocols, Adani Power System has  been able to sustain and islanded,” it said.
“Adani Electricity Mumbai Limited is currently supplying to critical services in Mumbai Around 385MW through AEML Dahanu generation. Our teams are working to restore the supply in the affected areas at the earliest. We regret the inconvenience caused,” it added.
Maharashtra Power Minister Nitin RAut said the power will be restored within an hour. “Circuit 1 of 400KV GIS centre at Kalva-Padgha of MahaTransco was under repair and maintenance and the load was on Circuit 2. A technical problem in circuit 2 led to problems in power supply to Mumbai and Thane,” he explained.