Waymo has recalled 3,791 robotaxis after one of its autonomous vehicles drove into a flooded road in San Antonio last week. The unoccupied taxi was swept away by rising water, and no one was injured. Filed as a voluntary recall with NHTSA, the incident exposed a gap in how the self-driving system handles flash flood conditions.

This marks the second flood-related incident to hit Waymo's San Antonio fleet in about a month. Operations were temporarily suspended but reports say service is resuming later this week. Waymo will push an OTA software fix without requiring vehicles to visit a service center and has already limited access to areas prone to flash flooding.

The company's recent track record shows recurring edge-case failures. Waymo vehicles were also recently found to illegally pass stopped school buses. An OTA patch should address the immediate flood-routing error, but the pattern suggests autonomous perception systems still struggle with unexpected real-world scenarios.