The lights are back on at Grand Central terminal in time for Tuesday morning's commute.
The agency worked all night to repair damage from the burst water pipe that caused Monday's power outage.
The outage occurred on the lower level of Metro North's section of the terminal, limiting trains to the upper level.
Power has also been restored to the station's ticket machines and departure boards, as well as the systems that run Metro-North's website and Train Time App.
The MTA stresses trains and subways are running as normal, but they advise commuters to be prepared for possible lingering half-hour delays.