The disruption came just hours after major Metro North problems left commuters stuck.
A power outage at 81st Street disrupted A, B, C, D, E and M train service citywide, the MTA said.
A fallen branch disrupted the B train Tuesday morning, the MTA said.
Fire officials could not say if the death was an accident or a suicide.
Service on the A, C, B and D lines had been suspended on parts of Manhattan, Bronx and Brooklyn.
Elderly residents say renovations at the Buckingham hotel are making them sick.
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