In a short time a dose of 1 Sv causes acute radiation sickness, and a dose of 10 Sv is fatal." Short and to the point, the Sievert measurement informs all residents of imminent danger. Very democratic, that.
Note to Self, Monday, October 31, 2016, Well, Well, what do you know!? Forlorn little old Bismark, ND, sits up there guarding the country's border. Against what? I just watched the entry of detected and Un-detected Rad particles