Ignore the rtPCR test result data because SARS-CoV-2 still isn't a mandatory report condition (which is ridiculous) and so private labs don't report positive (or negative) results to any government regulators. The majority of tests are currently being conducted by private labs for people with insurance and only mostly critical cases are being tested, so basically no one infected is included in the statistics. The only ones being tested by the county are typically homeless, undocumented or other people who show up critically-ill to county hospitals.

Santa Clara county is about 2-3 weeks behind NY, which means the peak there will be roughly in 4-6 weeks. It's going to be a major disaster and emergency healthcare will be essentially unusable until mid June.