Floodwater swallowed lanes of Interstate 10 near McCarty Street in Houston’s East End on the night of June 4, 2026, forcing authorities to shut the highway in both directions after waves of thunderstorms dumped rain faster than the city’s bayous and storm drains could carry it away. The National Weather Service office in Houston/Galveston reported 3 to 5 inches of rain north of a line from Columbus to Kingwood, with rates reaching 1 to 2 inches per hour or more, and forecasters warned that additional heavy rain was likely before the system moved on.
The culprit was a deep plume of Gulf of Mexico moisture pushing into the southern Plains, a pattern the Weather Prediction Center flagged for excessive rainfall risk across a wide swath of Texas and neighboring states. For Houston, a city where modest elevation changes and miles of pavement leave few places for water to go, that kind of atmospheric fire hose can turn routine thunderstorms into flash-flood emergencies in under an hour.
What the National Weather Service confirmed
The NWS Houston/Galveston Area Forecast Discussion documented repeated bands of precipitation training over the same areas, a pattern in which successive storm cells follow the same path and stack rainfall totals quickly. Observed accumulations of 3 to 5 inches were concentrated north of the Columbus-to-Kingwood corridor, and the office placed the greater Houston area under a Flood Watch as conditions deteriorated.
The most precisely documented ground-level impact was the I-10 closure at McCarty Street, logged in a preliminary local storm report sourced from the Texas Department of Transportation. That report includes geolocation data and a time stamp, confirming that a major east-west artery through Houston’s urban core was impassable during peak evening hours. For the thousands of commuters and freight haulers who use that stretch daily, the shutdown meant detours through surface streets that were themselves at risk of flooding…