Foster City, California experienced a confirmed ransomware attack requiring a system-wide shutdown and emergency declaration, with no specific threat actor, affected vendor platform, or initial access vector publicly confirmed. The incident is relevant as a sector-level signal for public sector and municipal organizations regarding ransomware readiness, particularly around backup integrity, network segmentation between IT and administrative systems, and incident communication planning. No vendor-specific remediation applies; behavioral detection for T1486, T1489, and T1490 and backup verification are the primary recommended controls.