L.A. County’s coronavirus case rate has been increasing since late October, and in the last half of November began posting a 30% to 40% week-over-week increase. For the week that ended Wednesday, L.A. County was recording 2,483 cases a day — or 172 cases a week for every 100,000 residents. A case rate of 100 or more is considered high. Source: L.A. County COVID cases surge to highest levels since summer – Los Angeles Times