Not only that, but the windshield washer fluid you can buy in the Bay Area is NOT the kind that doesn't freeze. Which could lead to a surprise if you head up to Tahoe for skiing. You can buy the anti-freeze kind up there, but you are supposed to "promise" not to use it back in the Bay Area.
I actually discovered this by accident one morning a couple of years ago. We do get the occasional sub-freezing morning temperatures here during winter. One such morning I used my windshield washers and wound up with a nice, blinding sheet of ice on my windshield.
I had to pull into a parking lot and scrape it off with a debit card. Rather dangerous situation for those of us who don't encounter real winter weather often.
