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Re:Houston is experiencing its third ‘500-year’ flood in 3 y... by curiousgeorgio on Tuesday August 29, 2017 @11:00PM (#15129418)
A more accurate term for what you describe would be a clustering illusion[1], and it certainly could be a valid explanation (among other possibilities) for the observation made in the article.

[1] https://en.wikipedia.org/wiki/Clustering_illusion

Re:Houston is experiencing its third ‘500-year’ flood in 3 y... by honestoHeminway on Wednesday August 30, 2017 @10:58AM (#15132635)
Yes, or as with nuclear power, it could be that the base assumption regarding safety just was wrong.