the problem with these maps is that they take the information by county.that gives a somewhat distorted view. for example the long red box in Northeast corner of Minnesota is St.Louis and the light red to the East is Lake county.my prime canoe country.
i have no idea of what the "nature danger" could be up there.you could drown or freeze to death just about anyplace in Minnesota..that long red box could be reduced to a few tiny dots if the places where the real danger was..same with any spot on that map...sort of intresting though to find out what event put those countys on the map--