A cold blast gripping the US South threatens to bring record-breaking snowfall to New Orleans and Houston and a deep freeze that endangers oil and natural gas output and electrical grids.
Snow and sleet began dropping Monday night in Houston,
throughout most of southeast Texas by late evening. As much as 4 inches (10 centimeters) may fall by Tuesday, which would be a record for January, the National Weather Service said. New Orleans may get 7 inches, an all-time high for the region, as may Louisiana’s capital Baton Rouge…