https://www.mercurynews.com/2020/07/10/watch-see-how-coronavirus-is-now-spreading-faster-across-california/

Coronavirus cases continue to rise in California, breaking new records for hospitalizations, new cases, and deaths.

The spread of the virus is accelerating, but worsening outbreaks are concentrated in some parts of the state. To see where the virus is spreading, we calculated the rate of new cases in each county, the number of cases reported in the previous 14 days per 10,000 residents, then mapped that data over time. The animated map shows how — and when — the coronavirus spread around California from April 1 through July 9.