to expedite builders. Looking at the flooding, it was another example of shortsighted profits winning over the long term safety needs of the people.
I live in the So Calif desert where the average yearly rainfall is only about 7", but my small town has an extensive drainage system because we still have major flash floods that come down from the surrounding hills. Even with our low rainfall, when it does rain it's often a sudden torrent and the ground doesn't have time to absorb it and the water can flood the streets.
Unlike Texas, we have regs on construction, so dummies can't pave over a streambed to build a stripmall. Public safety is foremost. All the major streets in town have gutters, drains and street grates that pour into a labyrinth of huge underground pipes. The runoff water funnels water into catch basins and a natural stream bed that was enlarged and fenced to carry water into a large reservoir.
Our flood control system was expensive, but it is well maintained, and expanded as our population grows and the land use changes.