"I was near Tucson late last September. It was 106. It was 98 at 9 PM. It was miserable".
By the way, Phoenix isn't "Near" Tucson. Big difference in temps, PHX can be 10-15 degrees warmer. In case you didn't know, PHX is in a large valley, aka "The Valley of The Sun", Tucson sits at 2600 elevation and is cooler than PHX. That being said, yes, it is the desert and Tucson does get hot, but not to the extreme as everyone thinks. On those "warmer" days, if you're out the door by 7:00-8:00 am and after 5:00 pm you'll be fine. There are great places to run in the local National Parks (East Side-West Side), and the local golf country clubs are very accommodating to running on the their golf courses (when not busy).
When Lagat became the X-C coach at U of A I said it was a mistake. Nothing to do with Lagat as a person, and definitely nothing to do with his running accomplishments. Lagat simply doesn't have the ability to be an elite coach. As with most Kenyans, he does not comprehend the process of what it takes to communicate a training and or race plan. Their natural talent supersedes all conventional training and racing. Simply put, they just run fast and don't know why. IMO, Lagat's path to greatness as a runner is not comparable to most elite athletes. He's insanely naturally gifted, but lacks the coaching acumen to translate that to the athletes he coaches. Fred Harvey put blind faith into Lagat, and got burned. Now both have rode off into the desert sunset leaving a once storied distance program in shambles.