At the end of the day today, I closed the lid of my MBA and put it in the small case and into back pack just like any another day. 40 min drive back home and I did few things at home. I went and grabbed the MBA. I notice my backpack was warm?? I took the small case out and it was really warm. Took out the MBA It was SUPER warm and the fan went nut(full blast). I was like "Oh NOOOOOOOOO" I opened the lid, the screen was black and the fan was in full speed. Luckily it was 30 degree out side. I left the MBA outside with the lid open for 5 min. I took it back inside the house. At this point everything stopped and it was nice a cool... I pressed the power button two, three times.. NOTHING???? I was like "OH oh..." I gave it few more min. I press power again, the MBA came back alive.. Everything seems to be fine. I then shut if off and left it off for few hours. I turned it back on and it seems to be fine. I am wondering overtime this will shorten the life of my MBA??? I might have to do full shutdown before I pack in the backpack next time. What do you guy think? What a potential heart attack day....
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Almost cook my MBA 13 today.
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Reminder: Your Mac is still on in sleep mode.
Will it decrease the life? No. Silicon melts at 1414ºC. The aluminum frame would turn to molten soup before the logic board warps (aluminum melts down at 660ºC).
^ Silly information aside, all Macs have a temperature sensor. When it gets too hot, everything shuts down until it's cool again and safe to boot up. Your Mac will protect itself from heat.
Will it decrease the life? No. Silicon melts at 1414ºC. The aluminum frame would turn to molten soup before the logic board warps (aluminum melts down at 660ºC).
^ Silly information aside, all Macs have a temperature sensor. When it gets too hot, everything shuts down until it's cool again and safe to boot up. Your Mac will protect itself from heat.
I had stuff like that happen with my Macbook Pro. Usually because I closed the lid before or during unplugging a USB device. The laptop wakes back up or gets into a weird non-sleeping state.
The biggest damage is likely to battery life. Lithium ion don't like being fully charged and especially don't like getting very hot while fully charged.
But other than that you are probably ok.
The biggest damage is likely to battery life. Lithium ion don't like being fully charged and especially don't like getting very hot while fully charged.
But other than that you are probably ok.
Would there be any damage to the LCD components?
This is why I miss the sleep notification LED.
This is why I miss the sleep notification LED.
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There has to be more to this situation. What was different about today than "any other day". Also, if the lid of your Air is closed, what could possibly be in use that would cause the Air to heat up?
Something weird is going on.
If memory served, I believe I was charging the MBA while it is in sleep mode(lid closed). I just unplugged the power and put the MBA in the case. I normally didn't charge the MBA at work. But, I did every now and again. It must be the power unplugged event before I put the MBA in the case. I won't be doing that again, that is for sure 
This has happened with my MBP 13 several times. Somewhere down the road my battery/laptop power supply unit got really weird and would not let me run the laptop off AC for more than three minutes. I brought it to the apple store though and they fixed it even though i was a few weeks off warranty. If your laptop does break or do something freaky like mine did, your warranty will definitely cover it, so I wouldn't sweat it too much. Also, i'm pretty sure this happened to mine because I, like others in this topic, closed my laptop and unplugged my periphs in a weird sequence, so next time just make sure turning off your laptop is the last thing you do when you actually pack up.
If memory served, I believe I was charging the MBA while it is in sleep mode(lid closed). I just unplugged the power and put the MBA in the case. I normally didn't charge the MBA at work. But, I did every now and again. It must be the power unplugged event before I put the MBA in the case. I won't be doing that again, that is for sure
Unplugging wouldn't wake it up. I always unplug when its asleep. I've never seen it remotely cause an issue.
More likely, it wasn't really asleep. How would you know? There's no light, the screen might be off. But it would be warm.
+1 This type of info needs to be a sticky since there is several posts daily where people think their computer will overheat and destroy itself.
Not uncommon. Well at least happens once or twice per MacBook that I've owned. It just doesn't register the sleep instruction and stays on. It's no big deal though. Also, no reason to leave it outside. Not really necessary.
This is not what happened.
Yeah, silly information, mostly because the solder would melt away long before that. Silicon melting, and of course aluminum melting is not even close to a concern.