Intersting! I know that in the contiguous USA, you will never be more than 20 miles from a road no matter where you are, but have no idea how far one can drive from a town.
So if you're ever lost, you just walk? (Assuming nothing kills you in nature) Edit: Wait, no. You could be extremely unlucky and be walking parallel to the closest road, lol.
Weather is the only likely natural hazard outside polar bear country (and to a lesser extent grizzly country because grizzlies are less likely to see you as food). And if you are in polar bear country weather is extreme.
But as the saying goes “there is no bad weather just poor clothing choices.”