Don't think it can get much lower.
The imagery date on that screenshot was only a month after your photo.
So Cal Edison generates as much hydropower as they can each year from water stored in Edison and Florence, and their entire Northern & Eastern Hydro Systems, so these lakes get pretty darn low every fall anyway. The drastic drawdown shown in the photos of this thread might be associated more with San Onofre nuclear plant being decommissioned than the drought.
