it’s not safe to stay out to shovel until Wednesday (when the temps and windchill will finally be above negative)

i grew up in michigan and, yeah i shoveled snow in negative temps when i was 12... it's safe IF you bundle up properly.
some long johns, or even sweat pants, two pair of jeans... boots... (you can put breadbags over your socks if they leak or you don't have boots...
tons of layers of shirts, a ski mask, and gloves...
no problem... you want the outermost layer to be waterproof/windproof...
trench coats are actually quite functional and not just for murderers hiding guns...
and the more you shovel, the more you warm up...
of course, if the wind is real bad it gets kinda pointless, but you can kinda throw the snow with the wind and it'll fly away... (unless there's not one prevailing direction of wind)
ummm... road salt is pretty important... sand helps too....
also the layers help when you fall down on the ice...