"Some people say well, you don't really use it on a regular basis, but I tell you when the big one hits, these will be invaluable," Hayes-White said.
"You can easily find them. There's a round circle of bricks used in main intersections," said Tony Rivera, the former assistant deputy chief for the San Francisco Fire Department.
These are not your regular hydrants. They are independent and gravity fed, an ideal system because of our hills.
San Francisco has added underground cisterns for a citywide total of 222, many holding up to 75,000 gallons of water.
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