"fine within this timeframe", that may be shorter than you think. As things become more extreme new weather patterns seem to be emerging, with some weather events that surprised meteorologists. Think that a Canadian town at lat 50 got almost 50ºC this very year.

In the long term, if nothing meaningful is done, no place would be safe, at least in the open. But I don't know how things will develop in the 20 years timeframe, both in the climate and in the human side.