I've suspected the same in SoCal. DW and I have been feeling kind of bleh over the past few days, and as of today both of our families haven't been feeling great either. It could be something else too, but I wouldn't be surprised either way.
On the flip side, it's also fairly common to think the flu is just a cold virus or allergies because most people don't display much in the way of symptoms.
https://www.npr.org/sections/health-shots/2014/03/17/2908789...
Odds are this is just some random virus (>90% chance), but I wouldn't be surprised if it was COVID-19 either (<10% chance).
Edit - I also have a cousin living in LA that developed pneumonia, which again could just be coincidental.