I don't doubt what you say is true, but once the gas lines break after the quake there will be no water to fight the fires. The city will burn.
I have this huge book on that disaster....it says that thousands died...not the low number that Sunset magazine kept repeating...they literally rewrote history....
LA has the gas problem also, as evidenced in the Northridge earthquake...the oil pipeline that blew up in Sylmar, and natural gas in Northridge.