The Incident

On December 20, 2025, a fire at a substation plunged San Francisco into chaos, cutting power for around 130,000 Pacific Gas & Electric customers. As streets darkened and traffic lights failed, the city’s autonomous vehicles faced unprecedented challenges. The outage not only disrupted daily life but also brought Waymo’s robotaxi operations to a standstill.

Waymo’s Fleet in Trouble

Waymo’s autonomous Jaguar I-Pace fleet struggled to navigate the darkened city, with many vehicles becoming immobilized at traffic signal intersections. Social media footage showed clusters of Waymo taxis stuck at a single junction near the 14th Street depot, effectively blocking the flow of traffic. This situation forced Waymo to temporarily suspend its ride-hailing services to prevent obstruction for emergency vehicles. Operations resumed the following day, but the incident highlighted significant vulnerabilities in their technology.

Technology Limitations Exposed

Waymo’s multi-sensor suite—comprising LiDAR, radar, and cameras—relies heavily on pre-loaded data and real-time processing for navigation. However, the power outage hindered access to critical external traffic data, raising questions about the robustness of their systems. According to Business Insider, the failure to adapt to such infrastructure failures reflects an area needing improvement.

Industry Reactions

The outage sparked commentary from industry leaders, notably Elon Musk, who claimed Tesla’s smaller robotaxi fleet remained operational during the power disruptions. Musk’s remarks on X emphasized Tesla’s reliance on a camera-and-AI-only approach, contrasting with Waymo’s sensor-heavy strategy. This incident underscores the ongoing debate regarding the reliability of different autonomous vehicle technologies during unexpected edge cases like outages.

Implications for the Future

The San Francisco blackout serves as a wake-up call for the autonomous vehicle industry. It highlights the pressing need for enhanced offline capabilities and the development of more resilient navigation systems that can function independently of city infrastructure. As cities evolve and the demand for autonomous transportation grows, ensuring that AVs can handle unforeseen disruptions will be crucial for broader adoption.