The fire broke out on 47th Street near Fifth Avenue around 7:10 a.m., the FDNY said.
Donald Hodgkinson was injured in an explosion, while two utilities workers were hurt in a separate fire.
The fire shut down a block of West 23rd Street Wednesday afternoon.
Salt water corroding underground wires sparked the widespread outages, ConEd said.
Salt laid out for last weekend's snow storm has corroded wires and sparked fires, officials said.
Eight apartments evacuated onto 38th Street, where temperatures felt below zero, officials said.
The fire torched a car and filled six buildings with carbon monoxide, the FDNY said.
Salt that's spread to melt snow corrodes underground wires, which then ignite, officials said.
A manhole exploded on Prospect Park West near Fifth Street, shattering windows and injuring two people.
The blaze sent smoke into the department store Monday morning, workers said.
The power went out around noon Friday at P.S. 138 in Brooklyn and surrounding areas, ConEd said.
The cause was damage to underground wires, Con Ed said.
Flames poured out of manholes on West 81st Street and scorched two parked cars there, witnesses said.
The fire may have started in a nearby manhole before spreading to the basement, the FDNY said.
The explosion happened about 7 a.m. Friday morning, the FDNY said.
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