Emergency services sealed off an area of the town centre after a “drunk” man was reported on the railway viaduct bridge in Accrington.
Police, paramedics and four engines from the fire brigade are currently at the scene, traffic was being diverted away from the town centre and police cordons were in place.
King Street was closed off heading towards the viaduct.
The man was rescued shortly after 6pm.
Inspector John Fryer said trains were stopped between Church and Oswaldtwistle and Accrington stations due to the incident.
He said: “We were called there at 5.24pm today to a man sat and stood on the top of the railway bridge over Blackburn Road. He is a white man aged in his 40s or 50s.
“They believe he has been drinking - he appears drunk.”
He added that British Transport Police had also been informed and attended the scene.