A five-alarm fire at a construction site in San Francisco pulled in over 150 firefighters on March 11. The crews battled flames spewing from a 172-unit apartment complex owned by BRE Properties and successfully prevented the fire from jumping to other construction projects in the growing Mission Bay area of the city.
Though, immediately afterward, the site remained too dangerous for investigators to enter the building to start searching for the cause of the fire, early reports of welding on upper floors of the six-story MB360 apartments, also known as Block 5, focused attention on the construction work under way at the 312,000-sq-ft complex.