Why is it hard to sleep when it's hot, and why is it harder for some people than others?

Question

Why is it hard to sleep when it's hot, and why is it harder for some people than others?

Answer 1

The body is trying to keep at atypical temp of 98.6 and in doing this, the body is unable to shut down(sleep).Reason it is harder for some than others is their blood is thicker and are unable to tolerate hotter temps.But in reverse are better able to tolerate extreme cold.

  I find it useful to have an AC focused to just my bedroom and keep it at about 64 degrees and sleep like a baby in the summer months