Most of the increase in local temperatures are overnight lows in the Winter. I'm not sure there's any peer-reviewed mechanism to suggest that daytime Summer highs will increase 20F+ due to greenhouse gases in any parts of the world.
So your argument that this statement by them: "If you live in a region that usually was 90F in the summer and is now >110F regularly, that’s going to cause problem." is hyperbole, then? Okay, going with that, what temperature range would you find credible, as to describe a region that is seeing wilder swings in summer highs?
Pretty sure global warming is referencing the global affects, not regional ones. You can't make a global argument based on local temperature increases just like you can't make an argument that global warming is causing cooler summers based on the numerous regions that have experienced cooling in the same reference period. Also these are average temperatures increases, not summer high temperature increases.
It really doesn't - my source shows average summer temperatures (Th - Tl / 2). This does not say that those regions are experiencing high temperatures that are that much warmer, but that on average (including overnight lows) they are warmer.
