Donald Hodgkinson was injured in an explosion, while two utilities workers were hurt in a separate fire.
Salt water corroding underground wires sparked the widespread outages, ConEd said.
The suspects posed as ConEd workers to access the man's home and rob him, police said.
Con Edison officials confirmed they found a leak at 615 West 176th St.
Three buildings on West 60th Street were exposed to gas, officials said.
Neighbors complain the timers on lights surrounding The Prison Ship Martyrs Monument are not working.
Gas should be restored to 525 West 156th St. on Friday morning, Jackson's office said.
Customers in Willowbrook lost power about 12:30 p.m. Thursday, ConEd said.
Heat and humidity were expected to envelop New York through Sunday, the NWS said.
ConEd repair crews were on the scene shortly after the incident.
ConEd cut off the power last week at Mary Brimage's Thrift World Antiques, a local institution.
Some residents spent the weekend weathering chilly temperatures at the iconic inn.
Residents were left in a freezing building, facing a cold night that saw temps dip to 29 degrees.
The Spectra Pipeline will bring a new source of natural gas to ConEd's systems in the city.
Residents in three Washington Heights buildings say they have been without electric or heat for 2 weeks.
Get our daily New York City news and alerts!
Thank you for signing up!
Would you like to sign up for additional newsletters?
Thank you for signing up for additional newsletters.