Beat the heat
I grew up in Karachi, Pakistan, where the temperature is over 35C for most of the year. Days were hot, and on the many nights when the electricity failed, getting to sleep was hard. I developed the ability to sleep straight on the cool tiled floors of our house. No mattress or sheets - just a pillow.
Last night was so hot here and my legs felt so 'burning' that I was tossing and turning for ages until I suddenly realised that there was indeed a cooler place. I headed to the bathroom with my pillow and slept on the tiled floor. And that's where I'm going right now!