Just to be fair:
Flooding is a frequent occurrence in Texas, with various types of floods happening regularly across the state. Small floods, like those that determine river channel width, happen about every two years. More substantial floods, like the recent one in the Texas Hill Country, occur less frequently, with moderate floods every 5-10 years and very large floods every 50-100 years. Texas is particularly prone to flash floods, especially in areas like "Flash Flood Alley" in the central part of the state.