Obrien. And the blaze also destroyed a warehouse. There are no questions about the Structural Integrity of the pier it self. Reporter this fire was massive. San francisco fire chief Janine Nicholson says the fire likely started inside the warehouse. Because the warehouse was so big, it took a while for anyone nearby to notice the smoke and flames. Bright hot flames shut up into the dark San Francisco sky early saturday morning. The four alarm fire on pier 45 was attacked by land and water. 155 firefighters, 50 trucks and engines, and a couple boats did not allow the flames to spread out of warehouse c. Throughout the progress of this fire, we did see almost every portion of this Building Collapse in one area or another. Reporter the San Francisco Fire Department says one firefighter was injured. But no windows was hurt. Pier 45 in the heart of Fishermans Wharf is home to the historic ss Jeremiah Obrien and the uss penn penny know. Both are safe. The one major loss is the warehouse, a b