Although I grew up in So Cal I lived in the mountains, 8000' to 1000' was a regular commute for me and my family. We still got the snow (I think 23' in 30 days was the record when I lived there and not drifts that is everywhere), the ice, the hail, most certainly the fog, and any combination you can think of. Now add sharp curves at the end of long straight-aways, did I mention most of the curves are flat or off camber to the curve.
Now add all the flat landers that thought it would be a good idea to come up to the snow and try skiing or just stop on the side of the road and throw snow. Then they act surprised when the next storm front moves in and they are forced to battle the weather completely unprepared. This happens every weekend that it snows. A commute that takes 15 min in good weather can take 2-3 hours in bad, did I mention summer isn't much better the same flat landers (and semi trucks & RVs) will burn up the brakes slowing down for the turns at the end of the straight-aways they sped up to 60mph for. the smell of burning brakes is how we know its summer.
A Highway Patrol Officer told me once that humans brains are wired to process only what they can see in compromised situations therefore they can only plan for the cars and other obstacles that they can see, and planning ahead of your vision is something that has to be learned. So when fog was at the end of their hood they honestly were not thinking about the fact that a car might be having the same difficulty around the corner and traveling at a much slower speed.
And remember we are all guilty of this, at least once in our lives. As long as you keep moving in a straight line and velocity keeps at a constant it doesn't really matter the road surface (with in reason), so our mind isn't thinking of it yet. It's that change in direction or velocity that gets us thinking of adjustment and by then it might be too late.
I guess my point was no matter where you live you can find your self in this situation and you most likely will be unprepared. My flipped statement about So Cal was based on if you work a 9-5 job in LA, it doesn't matter how bad the weather that ain't happening.
So Remember BE SAFE