A significant Arctic blast is sweeping across the United States, marking the first deep freeze and snowfall of the season. Millions are facing frigid temperatures, with some regions, including Florida, experiencing record lows. Weather alerts are in place as snowfall is projected to reach up to 15 inches in certain areas, while others may experience severe cold conditions, possibly breaking historical temperature records that date back to the 1800s. The severe weather is expected to impact travel and daily life as the Eastern U.S. braces for winter-like conditions, including winter storm warnings and the potential for falling iguanas in the South. The cold front will affect over 180 million Americans, causing temperatures to plunge from coast to coast.