Dozens of property owners are suing San Francisco over flood damage when the city's storm drain system overflowed during a historic storm in December.
The San Francisco Public Utilities Commission said it did significant work after the 2004 event to prevent another flood. But the water flooded property again in Glen Park and the Mission District last year.
City leaders promised a quick response to financial claims.
Attorney Mark Epstein is filing a lawsuit for dozens of property owners.
"The city is breaking a promise -- a promise to fix the problem," Epstein said. "Breaking a promise to handle claims quickly."
A lawsuit over the same issue was filed by residents after the 2004 flood. The city had to pay more than $5 million.
SFPUC is not commenting on the latest lawsuit.