Perhaps you know these important signs of creative burn out: an overactive inner critic, a blue feeling about one's work, a sense of deep depletion despite relative safety and well-being.
Of course, relative is the word these days. But each of us has our baseline. And if the summer is rolling around with all of these symptoms, you might be giving so much out in your life, you haven't replenish the part of you that brings the good things back.
I've been noticing this myself. Whenever I'm teaching a lot, as I am now, and my private coaching schedule is full, I see my own burn out happening. My book-in-progress doesn't work, never will. I can't find time to write or even think about being creative.