A rare and deadly winter storm descended across the southern U.S. on Tuesday, leaving some record-setting snow totals and halting travel for millions of Americans in Louisiana, Texas and Florida.

The snowstorm has coated traditionally warmer parts of Southern USA with a deep lining of white powder, leading to flight cancellations and the closure of at least one airport.

Google Maps users in the United States will soon notice a significant change in their app: the Gulf of Mexico will be renamed ...