most of the destruction in san francisco following the earthquake of 1906 happened due to
1906 San Francisco earthquake As damaging as the earthquake and its aftershocks were, the fires that burned out of control afterward were even more destructive.[21] It has been estimated that up to 90% of the total destruction was the result of the subsequent fires.[22] Within three days,[23] over 30 fires, caused by ruptured gas mains, destroyed approximately 25,000 buildings on 490 city blocks. One of the largest of these fires was accidentally started in a house on Hayes Street by a woman making breakfast for her family. This came to be known as the "Ham and Eggs Fire". Some were started when firefighters, untrained in the use of dynamite, attempted to demolish buildings to create firebreaks. The dynamited buildings themselves often caught fire. The city's fire chief, Dennis T. Sullivan, who would have been responsible, had died from injuries sustained in the initial quake.[24] In all, the fires burned for four days and nights.