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.
No injuries were reported in the manhole fire at 49th Street and Seventh Avenue Thursday morning.
The explosions occurred on East 89th Street early Friday morning, an FDNY spokesman said.
No one was injured in the transformer explosion in front of 140 W. 51st St.
Manhole fires on 75th Street sent five people to the hospital and scorched nearby cars, FDNY said.
A manhole caught fire at the intersection of Maujer and Humbolt streets.
The fire broke out in two manholes near Myrtle and Washington avenues before spreading to a building.
Two manhole fires left several buildings with higher carbon monoxide levels, officials said.
A manhole fire at East 81st Street and Second Avenue has forced several streets to be blocked off.
More than 1,800 New Yorkers were without power Sunday evening, Con Edison said.
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