A tree-mendous freeze. Forecasters are warning that expected subzero temperatures could cause trees to explode as a brutal cold snap is expected to wallop most of the country in the coming days. Trees may split and burst across the Midwest and Northern Plains Friday and Saturday as a bitter Arctic blast from Canada sends temperatures plunging to roughly 20 degrees below zero,

Forecasters warn an extreme winter storm could trigger rare “exploding trees” across the Upper Midwest as temperatures plunge below zero, causing sap inside trees to freeze and crack bark. The storm is expected to bring widespread snow,