K, L, and M Muni Metro lines to West Portal are down (updates)
Final update (7:25 a.m., next day): SF Appeal reports that Muni Metro is running again following repairs overnight.
Update (9:36 p.m.): SFGate now reports that crews will work throughout the night to restore power to the damaged lines. SFMTA spokespeople hope to have service running before the morning commute.
Original post: SFGate has the story.