Hello, pud's friend.
Heat effects each of us differrentlt and some don't even have a problem with heat.
For me:
Think of a flower that has been without water in heat, it droops, wilts but when you give it water it perks back up.
That's me. Put me in the heat and I wilt (no energy), I feel weak and my legs feel like lead. If I spend some time in air condtioning I start to feel better.
The problem I have is heat will trigger my exacerbations. I hate July and August. If I make it past August without an exacerbation I have a good chance of being fine, at least until next year when it starts all over again.
I am also cold sensitive

The cold causes more pain and stiffness in my legs - I hate temp extremes.