Do you know how high 7 meters is? It means that all sea dikes in my country need to be increased 7 meters in height (and a lot more than that in width and mass). Or else most of the country will have to be evacuated. Many coastal area (where most of the world's population lives) will be in trouble.

Fortunately, 1000 years is a long time. I've read that Netherland will be able to adapt to a sea level rise of 1 meter in the next century (or maybe two centuries, which would already be a problem), but if it continues to rise at that speed, we'll have to figure out better solutions. In any case, it's going to cost a lot of money. Some minor investment now could prevent a lot of trouble in the future.

But "apres moi le deluge" seems to be the reigning attitude.