Something that I ALWAYS "stress about" in the back of my mind of "contingency planning" is "What will I do if I break down here...where it's 120º?".
Don't get this wrong, but my primary concern is our dog; our beloved 85 pound Golden Retriever. Here's my reasoning; my wife can cope, follow instructions, drive (the TOAD), fend for herself to get water, etc. Our awesome dog...not so much.
So, my first trip that I really had a fear of "what if" was way back in '19 as we landed in Fort Stockton, TX where I swore my temp gauge was broken! It climbed and climbed until...when we stopped...it read 127º!!! Granted, maybe the air temp was "only" 115-120º, but the point that concerned me was how hot it was AROUND the coach and...moreso...THE PAVEMENT!!!
My wife, felt confident because she said, "hey, we have A/C in here so we'll be fine and, I always trust you to fix the problem". After thanking her for her trust, I reminded her that with pavement that's probably 150º, there's not much I'm gonna do out there.
That's when I gave her the worst case scenario to help her understand better. When it's THAT hot, and you LOSE your A/C...you're in trouble...and your pup is in trouble even FASTER! So, I told her...if we DO lose power, I'll have to put you and the dog into our TOAD and you'll just have to drive to wherever you can seek shade. AND...we'd have to carry the dog across the pavement, cuz it wouldn't take but a few steps to severely burn his paw pads.
Here's something ya don't think of...
A couple years ago I pulled into St. George, where it was a toasty 113º; cooled down from 118º across the desert though...ha. I pulled into wally world since it was just myself...generator running full steam...which concerned me as well. Gee, do I open the hood, or leave it closed for more efficient airflow? I decided to take a shower to "cool off"...WRONG!!!! My fresh water tank was full of nice WARM water...so warm that it felt like I was taken a nice hot shower on a cold night. I got the quick lesson that a partial tank heats up pretty quickly and can become almost TOO warm to use for a shower.
So yeah...traveling in the heat; anything over 98º really causes me to have "background clutter" going on that I'd rather not have.