I boiled dry my 18/10 ss pot, is it damaged and unsafe to cook with now
Stainless steel pots are pretty much indestructable and it should be safe to cook with. Just give it a good cleaning. Some hardwarevstores (lowes) have a ss cleaner that might get rid of the yellow tinge. Otherwise, it'll look like every other well used ss pot. 

18/10 ss is 18% chromium, 10% nickel, and balance in iron and stable
to higher temperatures. If you didn't drop the hot pot in cold water, or the bottom is really thick, you shouldn't have warping issues either.

An egg timer might be handy next time ;)