By Georgina McCartney and Brendan O’Brien
HOUSTON (Reuters) -A rare winter storm churned across the U.S. Gulf Coast on Tuesday, breaking snowfall records more than a century old in a southern region where flurries are unusual, as much of the United States remained in a dangerous deep freeze.
A snowstorm warning was in effect for 31 million people – from southern Texas east through Georgia and north to the Carolinas and into Virginia – until Wednesday morning, the National Weather Service said…