The MTA workers were repairing the 4, 5 and 6 lines when they were burned, according to officials.
The man was taken to Maimonides Hospital in critical condition, the FDNY said.
Workers doing repairs to a power supply at the Intrepid received burns, officials said.
The explosion injured two tenth-grade students at the West 61st Street school
Stella Balcazar, 57, died when her Elmhurst home was engulfed in flames early Monday, her relatives said.
The victim's face was burned after a propane tank caught fire in a West Street building, FDNY said.
An inferno tore through 316 E. 34th St. early Wednesday, leaving one man critically injured, cops said.
Shaniesha Forbes, 14, was found naked and burned, but cops still don't know how she died.
The woman was burned on her back and face in the East 73rd Street blaze.
Both the man's arms were burned in the fire at an Eadie Place home, FDNY officials said.
The incident occurred after a train hit an open signal box near West 72nd Street and Broadway.
A street in Washington Heights was named after Sgt. Merlin German to honor the local marine who died two years ago.
A fire broke out inside a residential high-rise on East 75th Street Tuesday night, seriously injuring one person.
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