I live in Miami, Florida ( the sunshine state) after my TT and RAI, I'm been feeling that when it's hot me energy go down . I excercise every morning, trying to eat healthy, but around 5, I'm tired. Now I on vacation on Washington , DC it's been freezing , 10 , 20., and I feel great like before the cancer. I walk a lot , eat great, feeling with a lot of energy, my poor husband it's telling me that he is exhausted . He can't believe my energy change? It's this normal?