If you zoom out they go from Orange to blue. I saw something similar happen happen the other day in Oregon on google maps. I’m not sure if they are blocking stuff out. Maybe it is a new way of blocking out a military bases? They used to just blur stuff.
I used the street view and couldn’t make out what was there.
But I would love it if someone familiar with the area could tell us what is there. I’m curious now too.
edit :: and I will send this to nikipedia. She lives in the bay area and might know.