Stuff gets made out of different things in different climates. In Arizona it's not a big deal because the engineers expected 40 celsius as a regular occurrence

Stuff gets made out of different things in different climates. In Arizona it's not a big deal because the engineers expected 40 celsius as a regular occurrence and chose material compositions to withstand it. In the UK, they didn't, and we're seeing the consequences. 40 celsius has never happened in recorded British history. The previous record was 37.something. I imagine Arizona infrastructure would fail pretty rapidly if temperatures somehow dropped to -30 celsius, and there would be Novosibirskians wondering what the big deal was.