I know a thing or two about these
In Yangon, it's routinely 30 degrees at night and power-cuts mean air-con is not a given.
But seven years of steamy Burmese nights taught me how to handle this.
Foundations first. Keep the windows and curtains closed during the day. Open them only if it's cooler out than in.
Move slowly. Glide around the house. No hopping up the stairs two at a time.
Have a warm shower before bed. It sounds counter-intuitive, but it works.
Synthetic fabrics be-gone. Cotton only. The thinner the better.
Sleep under a sheet. It encourages evaporation; essential.
Assume the star-fish position. Do not move.
Good luck. I can't promise a cool night's sleep, but we can help the rest of summer feel more comfortable.

