https://www.siliconvalley.com/2020/11/20/coronavirus-san-francisco-on-verge-of-purple-tier-on-pace-for-record-hospitalizations-health-officer-warns/

With coronavirus cases surging in San Francisco, the city’s top health official warned Friday it could be forced to close more businesses and abide by the state’s curfew order as soon as Sunday.

On its current trajectory, San Francisco would reach purple tier status “potentially as early as Sunday,” Dr. Grant Colfax said during a virtual update Friday, and hundreds of people could be hospitalized in the city by the end of December.