Now that a second, $51 million round of FEMA funding for home buyouts has come through, here’s the map of where the latest government snatch-ups are planned, 294 total. As indicated by the red dots above, they’re all outside the Loop — with a good portion grouped in 3 distinct clusters along Cypress Creek (which drowned out previous flooding records along nearly its entire length during Harvey). Other hotspots include several along White Oak Bayou, as well as a Greens-Bayou-adjacent bunch off Beltway 8 just north of Aldine and a San Jacinto River-side group south of Hwy. 90, near Highlands.
The money Harris County Flood Control District expects to receive for these purchases supplements an earlier $25.6 million FEMA committed to it on June 4. That previous check (along with an $8.6 million match the Harris County Commissioners okayed in order to get it) will be spent on about 169 buyouts, mapped out below:
Houston’s flood czar Steve Costello tells the Chronicle’s Mike Morris that 
“Every home is susceptible to flooding. There are not ANY non-flood areas. There are only homes that are more likely to flood and homes that are less likely to flood. The likelihood is expressed, on flood maps, by the single-year probability of being flooded (with some other factors). This does not properly describe the likelihood of being flooded during the course of a longer time period — of, say, a 30-year mortgage. Homes eligible for NFIP preferred flood rates can have up to just less than a 1 percent chance of flooding annually. These ‘preferred areas’ are what the public thinks of, euphemistically, as non-flood areas. Assuming a .009 probability (just less than 1 percent), a home has a 20 percent chance of flooding, at least once, over the course of a 30-year mortgage (look up binomial probability). An alternative way to think about it is that 1 in 5 homes, in preferred flood zones, will flood over the course of a 30-year mortgage. [In that case,] you are actually more likely to experience a flood than a house fire in a ‘preferred flood area.'” [
