Most computers only work between 40 and 100 degrees. Therefore if you say temperatures are 90+ then you will have problems with most computers.
Laptops are more of a problem because of the confined space that they work in.
Therefore check you have plenty of space around them. Use it on a table, rather than possible on your lap or carpet, etc. Also check that the fan comes on. If it does not come on then get it replaced.
Hope this helps
Denis