Just three and a half months after promising safer streets, cleaner neighborhoods, and a more inviting city for visitors, San Francisco Mayor Daniel Lurie marked his 100th day in office with both celebration and caution.

SF Mayor Daniel Lurie will mark 100 days in office Friday and is looking back at his first three months on the job and the challenging days ahead

There's a sense of hope and optimism people haven't seen in a long time,' San Francisco Mayor Daniel Lurie said of the city's nascent rebound.