They have been putting a new water line in my rural residential area. Doing a great job, they got to a valve and had some problem with it, ended up stripping down the valve and caused a "low pressure event" or backflow in our area. It went out about 9 this morning and won't be back on for another 4 or so hours. We will be fine, we have drinking water, and extra water in storage, plus 1000 gallons in the irrigation system mainline, and for toilets and other needs. It is just a good drill for a possibility. Some people are having some minor issues, but if a major earthquake took out water distribution infrastructure, it would be some major problems. Not for us, but other people probably.