현재 카운티 별 tier status: https://covid19.ca.gov/safer-economy/
https://www.politico.com/states/california/story/2020/11/16/california-pulls-emergency-brake-in-bid-to-stop-unprecedented-virus-surge-9424725
https://abc7news.com/california-covid-watch-list-criteria-newsom-4-tiers-reopening-plan-ca-county-map/6393906/
Here are the latest tier changes:
Orange to Purple: Alameda, Butte, El Dorado, Napa, Nevada, Santa Clara, Siskiyou, Trinity, Tuolumne
Orange to Red: Colusa, Del Norte, Marin, Modoc, Mono, Plumas, San Mateo
Yellow to Orange: Calaveras, Sierra
Yellow to Red: Humboldt, San Francisco
Red to Purple: Contra Costa, Fresno, Glenn, Kern, Kings, Mendocino, Merced, Orange, Placer, San Benito, San Joaquin, San Luis Obispo, Santa Barbara, Santa Cruz, Solano, Stanislaus, Sutter, Ventura, Yolo, Yuba