If I was laying in bed at 87 degrees, I would be miserable. I guess it has more to do with what you are accustomed to...Is the temperature of 87 common for you to sleep in? I sleep most comfortably at 67.
I think everyone has a comfortable sleeping temperature. I would suggest a fan, or a cool wet towel to relieve the heat rash, and an air conditioner if this is a long term thing.
Some people have health issues that cause heat related problems, often associated with sleep. Keep 'em cool, and keep 'em happy! Good luck!