Nimbus Summit You'd say he hung the moon, I'd say he hung the galaxy

Summertime was upon them. Each day, the temperature climbed a little higher, and each night Lane and @Tuuluuwaq bedded down a little further into the caves beneath the Summit, seeking relief in the cool darkness. 

In the absence of light, the only indication that dawn had broken was a gradual warming of the air in the caves. At first, it seemed that this was the sensation that roused Lane from slumber. She awoke, and her skin was alive. Prickling, crawling, burning..

Incidentally, there was more than one kind of heat that could creep up on a pair of lovers in the night.  

"Tuulu," she hummed, wriggling against his sleeping form. A delightful shiver ran down Lane's spine.