Considering normal New York January highs hover just above freezing, with water temperatures not much warmer, staying in for any amount of time is no small feat.

BBC: An icy dip off the coast of NYC

At the time of the crash there was low cloud, poor visibility and patches of freezing fog.

BBC: London helicopter crash: Crane work resumes on tower

Still, there's now a freezing wind blowing outside and that appears to be blowing away much of the smog, just in time for Sunday's marathon.

BBC: China diary: Beijing air and Weibo warriors

But they had the same point of view: Egg freezing gave them options for fitting a family into their work lives and time to meet a future partner.

WSJ: Why I Froze My Eggs (And You Should, Too)

Aside from the sweltering daytime heat and the freezing night-time temperatures, the biggest problem for folks living in desert regions is finding sources of water.

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