there was a windchill of -18?? isnt that kinda dangerous for someone to be in for like say, 30minutes, let alone 6.5 hours?
-18 is nothing.
I'm not trying to be a dink here, but after 4 weeks of -30 or worse (pre windchill), you get a bit climatized. -20 when the ambient temp is only -6 is not big deal. And if you're moving around, you're fine.
You gotta get into the -30 area before you'd consider it cold and dangerous. -40 is deadly, and actually killed people in the province that hit the ditch and tried to walk to safety. Game over.
R35