Lilac blooming in mid October - problem?
Hi - Yes, we are seeing a few landscape trees and shrubs with a few flowers at this time of year and it is a sign that the plants were under stress (such as from drought). Spring flowering plants produce next year's buds immediately after they finish flowering. Sometimes after a period of stress, when conditions regulate again in the fall, plants will open some flowers out of synch. There is really nothing you need to do besides water during this period of drought, as you have been doing. These two articles provide more information: