Trained officers, together with fire crews and paramedics were called to the West Street Car Park in Blackpool at around 5.30pm today.
At 7.15pm a police spokesman said: “We have an incident on the car park which has been going on for an hour and three-quarters.
“We are negotiating with a woman, although it doesn’t seem she has made any attempt to jump.
“The fire brigade are in attendance and I understand the ambulance service has been requested as a contingency.
“It is on ongoing incident and, as yet, it has not been resolved.”