https://www.mercurynews.com/2021/03/12/map-of-california-covid-tiers-more-than-half-of-state-now-in-red/

A second reassignment this week of COVID-19 restriction tiers — triggered by a vaccination threshold — allowed 13 California counties to move from purple to red.

Friday’s announcement said the counties moving out of the most restrictive tier are: Contra Costa, Sonoma, San Benito, Mendocino, Siskiyou, Colusa, Placer, Amador, Tuolumne, Mono, Los Angeles, Orange and San Bernardino.