The excellent "Marin Fire History" website has a detailed account of the devastating wildfires that burned huge swaths of Marin and the Bay Area the week of September 17, 1923. The Marin fire, the largest in our recorded history, burned from Novato to Bolinas, destroying homes and threatening whole towns in its path. The late season fire weather and low fuel moistures, similar to what we are experiencing today, contributed to a fire siege that gripped much of California, burning Berkeley, Marin, El Dorado, Sonoma, Petaluma, Ukiah, and Santa Barbara - in all 18 counties saw major fires.
"This week we start to tell the story of the massive and devastating fires throughout California during the week of September 17th. Over one thousand homes lost, including 30 out of the 35 in Woodacre, and over 600 in Berkeley. The main contributing factors were the north and northeasterly winds, very low humidity (5% at Noon in Berkeley on the 17th), and high temperatures. It was one of the largest fires in the history of Marin County, where a smoldering fire in Ignacio was kicked up by strong north winds, running over Big Rock Ridge into the Lucas and Nicasio Valleys, over Loma Alta into Woodacre, around Forest Knolls and Lagunitas, and over the Bolinas Ridge to Bolinas.