In July, 1989, I drove my German Shepherd from Flagstaff to Newport Beach in my Honda Civic with no a/c. It was 122F in Needles and I brought a few gallons of water to pour on the dog and keep her cool. Temperature was 68F in LA when we arrived that evening.
In July 2006 I drove with one of my kids from Cupertino to Fort Collins in a different car with no a/c. It was 115F in Sacramento. At Donner Summit it was cold.
Hot temperatures like this happen all the time in California and Arizona. No one used to think anything of it, until McKibben et al drove everybody looney.