Six fire crews have been fighting a blaze involving the roof of a block of flats at Layton.
The alarm was raised at half past three on Talbot Road near to the junction with Devonshire Road.
A full evacuation of the property was carried out and the fire has now been brought under control.
Nobody has been hurt, and an investigation is underway.
The fire was located on the roof of the property and firefighters were using two hoses, the aerial ladder platform (ALP) and some small tools.
Talbot Road Road is closed at the junction of Devonshire Road