Waymo Pauses Robotaxi Service After Vehicles Drive Into Flooded Streets

Severe storms and flash flooding in several U.S. cities recently forced Waymo to pause parts of its robotaxi service, highlighting how difficult real‑world conditions can still challenge autonomous driving systems.

The Alphabet-owned company temporarily halted operations in Atlanta and several Texas cities—including San Antonio, Dallas, and Houston—after multiple vehicles encountered flooded roads during heavy rainstorms. The interruptions came just days after Waymo issued a major software recall meant to reduce exactly this type of risk.

A Robotaxi Drove Into Floodwaters in Atlanta

One of the most widely reported incidents occurred in Atlanta, where an unoccupied Waymo robotaxi drove into a flooded intersection during severe weather and became stuck for about an hour before it was recovered.

The event helped trigger the local service suspension. Reports said the vehicle entered the flooded street before stopping, underscoring the challenge of detecting or predicting rapidly forming floodwaters on city roads.

Following the incident—and similar concerns in Texas—Waymo temporarily paused service while engineers evaluated how its autonomous driving system handled severe weather conditions.

A Recall Meant to Prevent Flooded‑Road Driving

The flooding incidents came shortly after Waymo voluntarily recalled 3,791 robotaxis in the United States due to a software flaw that could allow vehicles to enter flooded roads.

The recall was prompted by an April 20, 2026 incident in San Antonio, where a Waymo robotaxi encountered an impassable flooded lane during extreme weather. The vehicle was unoccupied and no one was injured, but the event exposed a gap in how the system recognized dangerous road conditions.

Waymo’s response was a software update delivered over the air, designed to better restrict the vehicles from entering flooded roadways—particularly on higher‑speed roads where flash flooding can be especially dangerous.

However, the subsequent incidents suggested the update did not fully address all real‑world scenarios involving heavy rain or flooded urban streets.

Why Waymo Paused Service Despite the Software Fix

The company paused service because the software update targeted a specific scenario: vehicles entering flooded lanes on higher‑speed roadways. Urban flooding during storms can occur in different ways, including rapidly forming standing water at intersections or low‑lying streets.

In practice, that meant the system could still encounter situations it was not yet fully trained to handle. Pausing operations allowed Waymo to review the behavior and refine its detection and safety controls.

Using Weather Alerts to Manage Risk

Waymo has said its operations teams also rely on external weather signals—such as National Weather Service alerts—alongside internal monitoring of road and weather conditions to determine when to restrict or suspend robotaxi operations.

This approach highlights an important aspect of current autonomous‑vehicle deployments: safety decisions are not made by the vehicle alone. Instead, fleet‑level monitoring systems and human oversight can temporarily disable service when severe weather creates unpredictable driving conditions.

Growing Regulatory Scrutiny

The flooding incidents arrive during a period of broader federal scrutiny of Waymo’s autonomous driving system.

School‑bus safety investigations

In October 2025, the U.S. National Highway Traffic Safety Administration (NHTSA) opened an investigation into reports that Waymo vehicles failed to properly stop for school buses with flashing red lights.

Documentation submitted by the Austin Independent School District described 19 instances of Waymo vehicles illegally passing stopped school buses during the 2025–26 school year, which prompted additional regulatory attention.

The National Transportation Safety Board (NTSB) also launched its own investigation into incidents involving robotaxis passing school buses in Texas.

Crash involving a child in Santa Monica

Another major incident occurred January 23, 2026, when a Waymo automated vehicle struck a 9‑year‑old student in a Santa Monica school zone. The child sustained minor injuries.

Federal investigators say the child ran into the street from behind a parked SUV during morning school drop‑off hours, and the crash is now under investigation by both NHTSA and the NTSB.

What the Flood Incidents Mean for Robotaxis

Taken together, the flooding incidents and ongoing investigations do not prove that autonomous vehicles cannot be improved through software updates. Waymo regularly deploys over‑the‑air fixes and operational changes across its fleet.

But the events illustrate a key challenge for autonomous systems: real‑world driving conditions—such as sudden flooding, unpredictable pedestrian movement, or complex traffic rules—can reveal edge cases that require further engineering and testing.

For companies building robotaxi networks, the ability to quickly identify these scenarios and update the software safely across thousands of vehicles is becoming one of the central tests of the technology’s readiness for large‑scale deployment.