A diesel block is a bit more robust but think about how long it takes the water pipes to split at home.
In case you have not had this fun a few times, about half a night below 25 degrees at the pipe.
You wake up wondering why the water pump is running continuously and you just don't want to look in the basement or crawl space.
Getting down to 10 and it works fast, at 0 faster than you can flow the water over the skating rink you are building in the back yard leaving a crappy, wavy surface.
You could have just left the truck running all night or and old style incandescent work light under the hood does wonders.
Really screw up have no antifreeze and -0 degree coming, put a blanket over the engine, some cardboard "walls" underneath and a plug in heater blowing under it.
Of course if I owned a machine warehouse I'd just make some room and pull it inside.
I've worried a lot, done the light bulb and the heater thing, but never lost anything in the cars so I'm not much help.
I just break pipes in the house, cabin, and shop.
In the cabin well pit I've learned to put in two light bulbs so that when one dies when I'm not there I don't have a bad weekend.
Look on the bright side this weather only happens once every 15-20 years.
Not so much the truck, I hope the boats are inside or ready for it.
Bob