The news is pretty depressing. There are reports that hospitals in Los Angeles and Orange counties are full of dying COVID-19 patients. A lot of them are hooked up to ventilators and most probably won’t survive past the end of the year. However, they are taking up beds in the ER and ICU so other patients are waiting a long time to be treated or just turned away. What a mess.
Unless these are new strains of the virus, the only difference between August/September and now has to be unsafe social interactions. Looking at cumulative cases over time by age, it does seem that this new new wave of cases is due to younger people.

I think the number in the top chart is for all time since nothing changes when I change the period drop down. From the bottom chart, it does look like the purple/blue colors are growing faster than the orange/yellow/red sections. This fits the narrative that younger people are tired of staying home, and believing that they are less susceptible to the virus, are resuming social interactions like there is no pandemic. I can’t get the website to show hospitalization by age group to check on the hypothesis.
In any case, we’re heading over to my sister’s house tomorrow for Christmas dinner. We’ve probably met them about once every few weeks. They don’t really go anywhere either but my nieces were going to school a few days per week and a few soccer tournaments in Arizona. There is some risk but they are literally the only people I’ve met in a social capacity since March. Let’s hope some of us will be vaccinated soon.