It's impossible as a coach to help you develop physically if we as coaches don't help you develop mentally.
As coaches, if we are cool with athletes complaining over things they can't control, we are not helping you.
I understand it is hot. It's 100 degrees, hell yeah it's hot.
But what you give your attention to, only brings it more attention. Focusing on how hot it is, is not helping you.
If I was doing a workout that had squatting and running, and after squatting during my run I was only focused on how heavy my legs feel, I guarantee you that run is going to be very difficult.
Instead, I'm going to turn my focus to "one more step" or "get to the next 100m marker", and I guarantee you that run will feel less difficult.
Our mind is the most powerful thing we have. How we use it and how we train it will determine the outcome of our performance and overall life. (The gym is a great place to develop your mind!)
I suggest you put your focus towards what you can control versus what is out of your control.