The deep freeze could mean problems for commuters on their way to work Tuesday.
Crews in the Delaware Valley made preparations throughout Monday night to battle against the roads icing over.
"The good thing today is we had a big ally. The wind and the sun that came out really dried up a lot of our roadways, especially our main corridors throughout the interstates and expressways," said Nick Martino with PennDot.
But some water main bursts across the region could present a whole new set of problems.
Sky Fox flew over one in Gloucester County.
Another one on Broom Street in Wilmington sent water gushing out onto 202.
The arctic temperatures could turn slick roads into a sheet of ice.
Transportation departments in the Tri state area sent out dozens of crews salting to prevent that.
"Right now what we're guarding against is there is going to be some areas and secondary routes maybe off some drive ways and off some fields where water may come onto our roadways that can ice up with this extreme cold that's expected over the next 48 hours," Martino said.
Martino said salt doesn't work when the road temperature is below 15 degrees, but they have a secret weapon.
"We'll have to add some calcium chloride with our salt and apply it. This will help activate, build some moisture up, so it will be able to crack the structure of ice," he said.
Robert Levin has a secret weapon of his own.
He's carrying 300 to 400 pounds of rock salt in the back of his pickup.
His supplies have him confident he'll be fine during his morning commute.
"The roads look pretty dry on my way back from West Point today. I'm more worried about the local side streets than anything," Levin said.
Martin Fusselman got ready by filling up his wife's tires, earning some brownie points, while watching out for her safety.
"I mean ice, it's tough, you can't really do anything about it, but the more prepared you are in regards to the safety of the car, it's not a bad thing," he said.
PennDot says they've used 57 thousand tons of salt to date.
They have 65 thousand tons left.
They're confident the roads should be in good shape tomorrow.