Most probably went to live with friends or relatives, some went to official shelters like the Half Moon Bay High School, people with animals or motor homes went to places like the Santa Cruz and San Mateo County fairgrounds and others are going to hotels and motels, many of which have lowered their prices for the evacuees.
I expect someday, there will be a major fire in Auburn. Most insurance companies won't insure the area my Auburn house is in. Very deep in trees. In fact, the first time I looked at it, I told the realtor "this is a nice area --until it all burns down". More of a question of when, not if, kinda like the big earthquake that will hit your area, that is already well overdue.
At least if I am there in Auburn and can make it to Reno, all will be fine. That was what I did last year then PG&E turned off the AC power. But now I have my RV there, so I have a choice, but they have not turned off the power there yet this year.
BTW, it is VERY smokey here in Reno. Big fire near Loyalton, CA and the wind is blowing this way. Here for Reno the weather report says air quality is "Very Unhealthy". Auburn is only "Unheathey".
I just looked out the window here and can see nothing at all. The smoke here is that thick from CA fires. Here, I am on the very top of this hill and can usually see the casinos below, as well as Mt. Rose. Today, I cannot see either.
Best if I stay indoors today.
-Don- Reno, NV