Crews were sent underground Wednesday morning in response to an incident that happened below the Sheraton-Baltimore City Center Hotel.
Officials with Baltimore Gas & Electric say that of two lines that run underground, one had an issue.
The line is contained inside a vault at the hotel.
Power was shut off so crews could make repairs. Though there was talk of an explosion by passers-by, officials say there was no such incident. What was thought to be an explosion could have been a blown fuse.
One person was treated at the scene for smoke inhalation.