NewsCopter 7 was over the scene, where FDNY marine units were spraying the bridge with water in an attempt to cool down the equipment.
FDNY officials say the bridge became stuck in an open position on the Bronx side around 2:45 p.m.
The New York City Department of Transportation said it was the result of heat expansion of the steel.
All lanes of the swing bridge were shut down in both directions between Manhattan and the Bronx temporarily as crews worked on the bridge.
The bridge reopened for vehicles in both directions around 6:30 p.m.
No injuries were reported.
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