Waymo Robotaxi Reportedly Entered Flooded San Antonio Roadway and Was Swept Into Waterway

April 20, 2026

A Waymo robotaxi entered a flooded roadway near Salado Creek in San Antonio on April 20, 2026, and was swept into a nearby waterway. The vehicle detected potentially untraversable floodwater but proceeded at reduced speed. No passengers were aboard and no injuries were reported. This incident raises concerns about the safety and responsibility of autonomous vehicles in hazardous conditions.

The incident led to restrictions on Waymo's operations and a recall of 3,791 fifth- and sixth-generation automated driving systems. As the use of autonomous vehicles continues to expand, it is essential that manufacturers prioritize the safety and security of their technology. The flood damage caused by this incident could have been mitigated with more advanced sensors or better decision-making algorithms.

Through contributors—JOIN US—to learn more about how the automotive industry can develop safer and more reliable autonomous vehicles.
Alleged deployer
waymo, robotaxi-operators, automated-driving-system-deployers
Alleged developer
waymo, automated-driving-system-developers
Alleged harmed parties
waymo, road-users

AI governance case studies

For forensic AI governance failure analysis (TAIMScore™ case studies), browse Human Signal’s Failure Files™.

Source

Data from the AI Incident Database (AIID). Cite this incident: https://incidentdatabase.ai/cite/1544

Data source

Incident data is from the AI Incident Database (AIID).

When citing the database as a whole, please use:

McGregor, S. (2021) Preventing Repeated Real World AI Failures by Cataloging Incidents: The AI Incident Database. In Proceedings of the Thirty-Third Annual Conference on Innovative Applications of Artificial Intelligence (IAAI-21). Virtual Conference.

Pre-print on arXiv · Database snapshots & citation guide

We use weekly snapshots of the AIID for stable reference. For the official suggested citation of a specific incident, use the “Cite this incident” link on each incident page.