[dredmorbius]

On a visit a decade or two back, there was a rather sobering history of fire on the mountain (Tamalpias) at a popular stop.

From the about 1875 to 1930 there was a major burn every few years. There has now not been on since the 1930s, a few grassfires excepted.

Houses extend far up the mountain. Streets are narrow, steep, and twisted. Trees grow two, and sometimes within structures. Wood and cedar construction are common.

Yes, the fog helps. But it won't protect forever.