Sleepie, I don't think there is anything wrong with having issues with the heat. Where I live it gets really hot, some days well over 100 degrees. It's all I can do to get from one place to the next, it just seems to drain you of energy, or it does for me. I also think it's a lot more intense in the city. I don't live in the city so there is lots of grass, lakes, etc where I am. However, in the city it's all hot pavement and people all over. I can see how it could cause some anxiety.
Fall is my favorite time of year, and I am counting down the months!