If you need to black out your sleeping space, I would like to introduce you too: rabbitgoo Blackout Window Film,... https://www.amazon.com/dp/B077XWJKQZ?ref=ppx_pop_mob_ap_share

This shit has allowed me to sleep deeper and longer (heh) and I only have it on part of my window. There’s no glue necessary, just soap and water. I’ve brought this stuff to music festival and blacked out all my windows for a premier camping experience. It’s made a world of difference for my boyfriend who is incredibly sensitive to light and we already had blackout curtains!

I live in Southern California so I understand the heat struggle, I’m telling you this shit has made a huge difference. while cotton sheets and fans and frozen pillows are great, I feel like this really helps to trap/repel the heat before I even hits you.