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San Antonio lies in the middle of what's known as Texas' "Flash Flood Alley," which is a flood-prone area that stretches from Dallas to Uvalde.

San Antonio lies in the middle of what’s known as Texas’ “Flash Flood Alley,” which is a flood-prone area that stretches from Dallas to Uvalde. Credit: Courtesy / San Antonio River Authority

San Antonio lies in the middle of what’s known as Texas’ “Flash Flood Alley,” which is a flood-prone area that stretches from Dallas to Uvalde.