Arctic air hits much of US

Some of this autumn's coldest weather yet is bearing down on the United States, enveloping the eastern two-thirds of the country in Arctic air on Monday and affecting millions of people.

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National Weather Service forecasters said the weather could bring record low temperatures in the U.S. Southeast, including all of Florida, where parts of the state were near 80 degrees (27 C) just a day ago.

The cold air brought gusty wind and red flag warnings in the Great Plains on Monday, and forecasters said the Great Lakes and Appalachian Mountain regions could see 4 inches (10 centimeters) to 8 inches (20 centimeters) of snow.