Cavern A: Kobold Lair

We were west of San Antonio last weekend when I spotted this cave opening in the hillside.  Luckily, we didn't encounter any wandering monsters from the Caves of Chaos.  I think probably because it was about 105 degrees that afternoon. 

I don't know how those D&D adventurers do it.  If I had been wearing any sort of armor, I'd have passed out from the heat.  Tell me, does heat ever become a factor in your adventure games?