Vaccinations are slowly but consistently increasing. Nationally we're at over 55% fully vaccinated and another ~10% partial.
Delta is running its course through a hell of a lot of unvaccinated [and some vaccinated] people developing natural immunity.
The most vulnerable groups tend to have the highest vax rates, so it's going to be primarily the young and healthy driving the case numbers, which is why the deaths haven't spiked nearly as badly as they did prior to vax availability.
I'm guessing that soon the 5-to-11 age group will get approved for the vax.
Eventually this starts approaching herd immunity, and cases will wane REGARDLESS of behavior, of weather, etc.