The story I read for analysis was on the Star Tribune Web site. It used numbers to make the story. Without them there would be no story.
The numbers are not overwhelming because the reporter only uses enough to convey the story, and doesn't list numbers that are irrelevant.
Surely this reporter had to dig for some of the numbers, because it is hard to believe that the numbers given in a disaster zone are totally accurate.
Most likely they got the numbers from government data, or a local New Orleans research agency.