Rainfall amounts on July 10, 2019. The highest levels are in red and the lowest in blue. (Comprehensive S&WB-City of New Orleans Stormwater Management Model)
The intensity of the July 10 rainfall — with as much as 9 inches in three hours — overwhelmed the city’s pumping and drainage system. Streets were inundated, and many became impassable; cars were submerged; homes and businesses flooded; and the tally of damages went far beyond an annoying commute.
Among the rumors circulating after the deluge was the claim that the massive Southeast Louisiana Urban Flood Control Program, or SELA, construction project, designed to reduce the flood risk in certain low-lying areas, hindered the drainage capacity in other areas of the city. Continue reading »