Residents in thirteen apartment blocks across the region may have to to move out unless potentially dangerous cladding is removed.
The warning comes in the wake of the Grenfell tragedy in London two years ago which claimed the lives of 72 people.
West Yorkshire Fire Service now says urgent action still needs to be taken to remove flammable cladding on buildings in Leeds, Bradford and Huddersfield.
The owners of all Leeds buildings identified by the fire service have been given until midnight today ( Friday 10 January) to tell residents exactly what work needs to be carried out and how much it will cost them.
In a statement West Yorkshire Fire and Rescue Service said: