>>> who could survive in that cold
I had to google it and found this:
"The use of wind chill is to show the effective temperature at a particular wind speed. For instance in calm conditions at -29°C a well clothed person is in little danger, if we add to this temperature, a light wind of 10mph, this will then give the same effect as a still air temperature of -44°C when exposed flesh can freeze in a minute or so. Increasing the wind to a breeze of 25mph gives an equivalent of -66°C with severe danger to exposed flesh within seconds rather than minutes".
So it's the wind chill temperature (and, of course, the amount and type of clothing worn) that's all-important, rather than just the temperature on a thermometer. Even so, those temperature referred to by Sanmac are ruddy cold! (I've refereed a football match with a wind chill temperature a bit below -20C and I know that an hour and a half outside in those sort of temperatures, especially when wearing football kit rather than thermal clothing, is far from pleasant!).
[Good morning, PP]