Agreed unsafe especially at night. Isn't the repair the responsibility of property owner?

I think it depends on who planted the tree. Ordinarily in Oakland, the city has an easement for sidewalks and the property owner owns the land and are responsible for the sidewalk; however, if the city planted the tree, they are responsible. To the best of my understanding.

Been in this neighborhood long time - long enough to have seen city came and patched sidewalk twice with just tar and gravel. Looks like city need to address this matter once and for all by first replacing tree since that tree will continue to grow and then fix sidewalk