The flash flooding posed significant risks to residents and infrastructure in San Antonio and surrounding areas. Low-lying regions experienced rapid water rises, leading to swift-water rescues and evacuations of RV parks near the San Gabriel River. The defect in Waymo's self-driving vehicles added to safety concerns, as affected cars could potentially navigate flooded roads, increasing the risk of accidents. The flooding disrupted travel and transportation, highlighting the importance of improved vehicle response systems during extreme weather events.