Self-driving cars are supposed to be smarter than human drivers. They do not get distracted, they do not speed, and they theoretically make better decisions behind the wheel. So when footage started circulating of Waymo robotaxis rolling confidently into flooded streets and then just… stopping there, the internet had some thoughts.
Waymo, the autonomous vehicle division owned by Google’s parent company Alphabet, has issued a voluntary recall affecting roughly 3,800 robotaxis across the United States. The National Highway Traffic Safety Administration published the recall letter this week, citing software issues that could allow the vehicles to enter flooded roadways, which is exactly as bad as it sounds.
The issues came to a head on April 20, when a Waymo vehicle in San Antonio, Texas entered a flooded road with no passengers on board and was swept into a creek by the current. That incident triggered a federal investigation, which ultimately led to the recall now on file with the NHTSA. Waymo’s San Antonio service remains suspended as the company prepares to resume public rides there.
The recall covers vehicles running Waymo’s fifth and sixth generation automated driving systems. The company says it has already identified the problem and is working on software fixes, while also putting temporary geographic restrictions in place to keep its cars out of areas prone to flash flooding during heavy rain.
What Went Wrong and Why It Kept Happening
The flooding issue was not a one-time glitch. Waymo vehicles in Austin, Texas were captured on camera driving into a flooded street and stalling, forcing other drivers to maneuver around them. Similar incidents happened in other locations around the same time, pointing to a systemic flaw in how the software handled water on roadways, particularly on higher-speed roads where the consequences of a bad call are much more serious.
Waymo acknowledged in a statement that it identified “an area of improvement regarding untraversable flooded lanes specific to higher-speed roadways” and decided to file a voluntary recall with the NHTSA as a result. The company framed this as a proactive safety measure, noting it provides over half a million trips each week across some of the country’s most demanding driving environments.
That said, choosing to drive a car into a flooded creek is a fairly dramatic version of a software gap.
This Is Not Waymo’s First Rough Patch
The flooding incidents are the latest in a string of high-profile stumbles for the company. Waymo vehicles in Austin drew criticism earlier this year for failing to yield to school buses, which is not just a traffic violation but a serious safety concern involving children. In December, during widespread power outages in San Francisco, Waymo robotaxis stopped in the middle of traffic and sat there, snarling roads during an already chaotic situation.
Each of these incidents has fed into a broader public conversation about whether autonomous vehicle technology is actually ready for the real world at the scale companies like Waymo are pushing for. The company currently operates commercial robotaxi service across 11 U.S. markets, with broad public access in San Francisco, Los Angeles, Phoenix, Austin, and Miami.
What We Can Learn From the Recall
There is a lesson buried in this story that goes beyond waterlogged robotaxis. The fact that Waymo filed a voluntary recall rather than waiting for regulators to force one is actually worth noting. The company worked with the NHTSA, disclosed the problem publicly, and is pushing a software update rather than issuing a physical parts recall, which is one of the advantages of running a software-defined vehicle fleet. Bug fixes can be deployed over the air.
But the incident also highlights a real tension in the autonomous vehicle industry. These systems are trained on enormous amounts of data, yet real-world edge cases, flooded roads, power outages, school buses, keep catching them off guard. Every company in the self-driving space faces this same problem, and the answer cannot simply be “we will update the software after something goes wrong.”
The broader takeaway is that expanding rapidly into new cities and more driving conditions is going to surface more of these gaps, not fewer. The question is whether companies can fix them fast enough to stay ahead of public trust eroding in the meantime.
What Happens Next for Waymo
Waymo says it is actively developing additional software safeguards and has already put mitigations in place that limit where its vehicles operate during extreme weather events. San Antonio service remains on hold, but the company says it is getting ready to bring public rides back to that market.
The recall affects a significant chunk of Waymo’s active fleet, but because it is a software fix rather than a mechanical one, the rollout can happen quickly. Whether that is enough to get ahead of the next round of bad weather, and bad headlines, remains to be seen.