San Francisco Department of Emergency Management (DEM)

Built World

Issued public safety guidance and coordinated response as core systems degraded

San Francisco is the kind of city that feels unstoppable—until the lights go out. On Saturday, a substation fire near 8th and Mission helped trigger a blackout that spread across neighborhoods, turned intersections into guesswork, and pushed daily life into slow-motion. Full restoration took until Tuesday morning—more than two days—sparking political backlash and raising basic questions about whether a modern city can tolerate single-point failures in critical infrastructure.

Updated Dec 25, 2025