Published specifications suggest that most helicopters have operating temperature limits around 125°F, but I expect that the weight they can carry starts to drop as they approach their limit, which reduce their value for firefighting above 120°F, which seems to be the cutoff for medical evacuation.
Seems like kind of a big thing to miss.
The economists involved (Nordhaus...or U of Chicago, surrounded by good delis for takeout) may have been sitting in an air conditioned office munching sandwiches while speculating on moving wheat fields to northern latitudes.
Yes, people have been writing about this for years. The "just move north" idea seems to have originated with the climate-change denial faction a couple of decades ago, and the lack of arable land was quickly pointed out. There are many other issues as well — the whole idea is unworkable.
