The main reason is that this summer has been much, much cooler in CA. In SV, for example, we've had a handful of days over 90 this year, whereas last year there were probably 20 days over 90 at this point in the summer. Our AC has only kicked on a few times all year, whereas last year it was on much more frequently.

There may have been increases in production, but it would have been shocking if we'd had rolling blackouts this year, given how mild the summer has been. Other parts of CA are warmer than SV, but AFAIK (having family in Sacramento and LA) this summer has been cooler than last summer all over CA.