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I think we can laugh at the south a lot, but if we had four days in Albany with the high of negative 5 and a low of around negative 25 each night, it would very taxing on heating systems and possibly power plants, especially in New England.
At minimum there would be a lot of burst pipes and house fires and spiking power prices, but also would likely be a lot of stress on natural gas supplies, with industrial consumers and power plants switching back to heavy oil or no 2, whenever it’s possible.
And North Dakota would laugh at us.