http://www.harcourtschool.com/activity/extreme/html_docs/Htemp.html
If you were to go outside for a walk, what would happen to you? How long would you survive? If parked your car outside, what temperature would the metal reach?
If your body stays at 108 for an hour or two your brain will suffer. That’s why fever is treated before any other symptom.
I should mention that just because its 130 outside does not mean your body will reach 130. It just becomes that much harder to keep it at 98.6.
Generately dehydration or heat/suntroke are the things you have to worry about. I imagine you would survive indefinitely as long as you didn’t exert yourself too much and kept hydrated.
I once spoke to a pilot who flew 737s in Australia. He told of an incident in which he was scheduled to land at Alice Springs. The temperature there was reported as 55 degrees C, and the handbook said that no landing could be done at temperatures above 52 C. He turned around and headed back to Adelaide.
He heard that some large flocks of birds dropped dead in that heat wave – some of them simply fell out of the sky.
You don’t have to go to Lybia to fry your brain. Plenty of spots in the US get damn toasty in the summer and the sun magnified by a car interior kills many children and animals every year.
A few years ago Phoenix hit 122º F and the airport had to be closed for the same reason. It wasn’t a certainty that planes could not take off but since the takeoff charts didn’t go to 122º it would have been a safety violation and illegal for the airlines to operate.
122º F = 50º C
For the aviation impaired high temperatures mean less dense air which means airplanes need more airspeed for the same amount of lift and therefore more runway to safely takeoff and land.