Tomorrow is the one year anniversary of the landfall of Hurricane Harvey, tied with Hurricane Katrina for the most damage done ($ 125 Billion) in US history. Harvey also resulted in 68 deaths (directly) + 39 more indirectly. (40 - 60 in of rain) While this is not the only cause, the paving over of soft ground contributed greatly to the flooding. Houston has seen rapid urban development, with absorbent prairie and wetlands replaced by hard surfaces which rapidly shed storm water, overwhelming the drainage capacity of the rivers and channels.Between 1992 and 2010, almost 25,000 acres of wetlands were lost, decreasing the detention capacity of the region by four billion gallons. However, Harvey was estimated to have dropped more than fifteen trillion gallons of water in the area. The Katy Prairie in western Harris County, which once helped to absorb floodwaters in the region, has been reduced to one quarter of its previous size in the last several decades due to suburban develpment, and one analysis discovered that more than 7,000 housing units have been built within the 100-year floodplain in Harris County since 2010. If somehow Houston could unpave all this paving, it would be a lot better off. Here comes September. Oh boy.