Houston flooding isn’t “unprecedented.” In 1935 the water reached 54 feet. Today, in the same place, it’s 38 feet. It rained almost 40 inches in 24 hours in this current storm but that’s not Unprecedented either. In 1979 it rained 43 inches in a 24-hour period. It should be remembered that Houston was built on land that was a former gigantic swamp.
There’s a pretty big swamp of a different kind in Washington DC today and draining it’s going to take a long time, it appears. A lot longer than it took to drain the one where Houston sits today.