We are not talking about steel skyscrapers here. We are talking about wooden huts. If they at risk of flooding the Vikings would have moved the huts further up hill.
Greenland was settled during the Medieval Warm Period, when melting glaciers made the land well watered and green, and abandoned when it got too cold to farm there.
*Melting glaciers made the land well watered and green,*
Why do you think it’s called Greenland?
I wish Trump couda’ bought it. He knows a thing or 2 about real estate.