The New York City Emergency Notification System said people should report outages. The New York City Council speaker, Corey Johnson, said on Twitter that there was a major disturbance at Con Edison's 49th Street substation, and that the utility was working to fix it.
Con Edison estimates there are 42,700 customers affected.
Parts of midtown Manhattan in New York City were hit with a power outage on Saturday evening, causing Times Square billboards and to go dark, disrupting subway service and cutting out traffic lights.
NYPD and FDNY are on scene, the NYPD announced on Twitter. Several subway stations also have lost power, prompting trains that are running to skip those stations until power can be restored. ConEd initially said it was "responding to extensive outages on the west side of Manhattan".
The Fire Department of NY said it was responding to multiple calls of people stuck in elevators.
Coincidentally, Saturday's power outage struck on the 41st anniversary of the 1977 blackout, which lasted until July 14.
"We're getting reports of power outages in station complexes throughout Manhattan". It advised people to stay away from underground stations. Con Edison had not yet responded to calls for comment, but tweeted that they were responding to a "widespread power outage".
Meanwhile, in Midtown west, in a neighborhood known as Hell's Kitchen, a man takes it upon himself to direct traffic. "Backup generators in one small studio", she tweeted.
A blackout affects buildings in the Manhattan borough of NY, U.S, July 13, 2019.
The outage occurred on the 42nd anniversary of a NY blackout that crippled almost the entire city during a heat wave on July 13, 1977.
NBC News correspondent and anchor, Kate Snow, tweeted a picture of a dark hallway at the network's headquarters, and said staffers were forced to use backup generators to broadcast Saturday's edition of Nightly News.