Are we sure that it's too warm on Mount Everest?

Red Hook man recounts Mount Everest climb

[May 22, 2010] O’Meara said he walked by five frozen corpses during his climb on the north side of the mountain in Tibet, an experience he described as shocking despite the fact that he was warned that many bodies cannot be extracted from the “death zone” and remain there.
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Meanwhile, temperatures got as low as 40 degrees below zero, and O’Meara noted all liquids froze quickly, including tears and mucous. Even the corneas of one member of his party began to freeze.

Global warming is 'making Mount Everest more dangerous to climb' - Telegraph

[May 25, 2010] Mount Everest is becoming increasingly dangerous to climb because global warming is melting glacier ice along its slopes, according to a Nepalese Sherpa who has conquered the world’s highest summit 20 times.