I know a lot of people have their anxiety triggered by the heat. It can happen to me in certain situations as well but usually only in the winter or in the middle of the night.

I get so hot at night (I believe because I grew up with a room that was always freezing cold so anything else feels like a sauna) Aside from go back to my childhood bedroom there isn't much I can do to cool down at night but I do find it helpful to have a fan directly on me. Over time I actually start to get cold and need to cover up. Not quite the same as winter time cold but it helps!