My iguana's color and appetite are off?

For the past week or so, my iguana has been shedding. So he has been a little moody, appetite off alittle. But that is normal for him. The past 2 days it has been really hot, in the hundreds...now his color is off, he isn't eating , and he LOOKS miserable. Should I worry? Or could he just be too hot like the rest of us?