A rare blast of snow, sleet and ice hit the U.S. South on Tuesday, prompting five states to declare a state of emergency, closing the New Orleans airport and causing chaos on roads for drivers unaccustomed to the dangerously slick conditions.
The southern cold snap is part of an arctic front that has put much of the Northeast and northern Plains under warnings and advisories for severe wind chills. Temperatures in parts of those regions could feel as cold as minus 30 Fahrenheit (minus 34 Celsius) on Tuesday, the National Weather Service said.
Georgia, Louisiana, Mississippi, North Carolina and South Carolina each declared a state of emergency, telling motorists to stay off the roads.
"Residents should not overreact but should make plans now to ensure they are prepared for prolonged freezing conditions and icy roadways," Mississippi Governor Phil Bryant said.
By Wednesday morning, the cold front is expected to blanket the Carolinas, Georgia and parts of Florida with a mix of freezing rain and sleet, according to the National Weather Service.
Forecasters say the front is moving slowly and the icy chill is not expected to leave the region until Thursday.
The last flight left New Orleans at about 11 a.m. local time (1700 GMT) on Tuesday and its Louis Armstrong International Airport was then closed to commercial traffic ahead of the storm. Authorities also shut the 24-mile (39-km) Causeway Bridge, which spans Lake Pontchartrain, because of icy conditions.
Residents and tourists excited by the novelty of the conditions took photos of icicles hanging from the wrought-iron balconies of the city's historic French Quarter.
Temperatures are forecast to hit a low of 23 degrees Fahrenheit (minus 5 Celsius) in New Orleans on Tuesday night and the city could see its first snowfall in years.
"This is pretty rare in New Orleans," Mike Efferson of the National Weather Service Office in Slidell, Louisiana, said of the conditions.
"This only happens about every 10 years."
Schools and government offices across a wide swath of the country were closed. Airlines canceled or delayed thousands of flights, and officials closed roads as conditions worsened.
North Carolina and South Carolina were expected to get the most