https://www.mercurynews.com/2020/05/25/coronavirus-alameda-county-continues-to-lead-bay-area-for-total-cases-1-death-in-contra-costa-county/

As data showed that more than 94,000 people across California have tested positive for coronavirus, Bay Area counties also reported new cases on Memorial Day, but only one new death — in Contra Costa County.

Since last Tuesday, Alameda County also has become the hardest hit county in the Bay Area, in terms of the total number of COVID-19 cases, according to data compiled by this news organization. Alameda County public health officials reported Monday that 2,874 people have tested positive for COVID-19 since the start of the pandemic, with 26 new cases reported from the day before.