Apple Thoughts: Apple Issues Warning About Heat

"Whether or not anecdotal reports of iPhones overheating are true or not, Apple has taken them seriously enough to reveal the presence of a temperature warning screen for the iPhone 3G and 3GS. Here's the deal: an unknown but probably very small number of iPhones have been affected by overheating, to the point that some white iPhone 3GSes have allegedly turned pink. Sascha Segan, our phone analyst, said he hasn't seen any such problems with his iPhone 3GS, however."

There ya go. Heat can hurt electronics. Aren't you glad we have have companies to tell us stuff like this?