Yes, I was born there, and have been back several times, including visits to the Deltaworks, and have observed the drainage system, windmills, the Afsluitdijk, locks, et cetera. That's why I reacted to the statement that seawalls are of no help with rainfall.  It does appear that the Ike Dike might not have helped much in this particular storm as it is more of a breakwater than an actual seawall.  But the general idea that the coastal cities of the southern USA are not doing enough, as the writer asserts, seems correct.