It might not seem like there's too many positives to negative temperatures like these, but in the Northland, that's not the case.
The frigid temperatures are especially good for our trees.
That's because pests, especially invasive ones like the emerald ash borer, can't survive certain extremely cold temperatures.
Arborists say once temperatures hit about zero, the larva starts to die.
The ash borer has been found in ash trees in St. Louis County, leading to quarantines.
Experts say temperatures of 10 to 20-below, and prolonged periods of cold are particularly effective.