Good question LGP, We (and not the Royal we, also the wife) would be safe. The Dutch are very clever and have since 1953 been bolstering sea defences and the way they manage water. The IJselmeer was basically sealed of from the North sea and controls a lot of the flow of water into the Netherlands via the different gates and what not that feed the different water systems. The biggest threat to Holland actually comes from rivers inside like the Maas, the Rijn, The Danube. If these rivers flood they leave massive devestation across Europe. That's why I have told Mrs DST that we should get a dinghy as a means of escape should flooding happen. If I can find a pic that I took of the local City Hall I will post that up, shows you everything in relation to the sea. One thing, no fukker would be flying out of hear. Schiphol is properly under water.
And there is someone actually building an Ark in Holland, Duchieman I think posted it on the 600, hehe. I will be making space in the escape dinghy for my jars!!!! Whether Mrs DST likes it or not. She travels light anyway, hehe.