I suppose if you don't want it to for whatever reason it'll shut off if it gets too hot (perhaps short of where it would otherwise start cooling) instead?
Upper Midwest here. Our power doesn't go out often, but of the times that it has, I think only twice was above -30 degrees.
It really varies a lot by your utility company though; our coop is quite good for the most part. On the other side of the same state, my brother is in an area more prone to bad storms and tornados, so he's had to deal with several multi-day blackouts. It gets hot here, but not above 40c in the shade, so he'd probably be fine if it can handle direct sunlight. If not, a gasoline / nat gas / propane generator would be far more reliable.