Frequent heavy rainfall events make roadway flooding a concern for travelers throughout the Houston region. Houston TranStar, in cooperation with the Harris County Flood Control District's Flood Warning System, has developed a roadway flood warning system to alert travelers of areas where roadway flooding risk is high during rain events.

The system uses a comprehensive network of sensors to estimate areas of roadway flooding risk. Note that the warning areas do not confirm the presence of roadway flooding but do identify areas where the risk of roadway flooding is high.

The areas likely to be experiencing roadway flooding are highlighted on the Houston TranStar traffic map. Travelers are recommended to avoid any unnecessary trips through these areas and should exercise extreme caution if they absolutely must travel.

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