A London Fire Brigade spokeswoman added: "We advised that a section of the track should be temporarily closed due to the short term risk of debris falling from the building onto the track.
"Search and rescue are currently securing the loose debris so that the station can open again."
Severe delays have been reported on the rest of the Hammersmith and City line.
Services were suspended on the two lines at 11.20am. It is not clear when they will start again.