Two States Remain Under 'Extreme Cold' Warning Sunday

The last week has featured several blasts of wintry weather across the United States, resulting in periods of heavy snow, biting cold and other hazardous conditions.

As of Sunday morning, areas of two Midwestern states remain under an "extreme cold" warning, according to a map from the National Weather Service. In parts of Illinois and Indiana, wind chills will be below zero, posing serious threats to those who have to venture outside.

Central Indiana in a deep freeze

According to the NWS Indianapolis, 18 counties in central, north central and west central Indiana are under an "Extreme Cold Warning" until 11 a.m. ET Sunday, with a "Cold Weather Advisory" taking over until 9 a.m. ET Monday.

"For the Extreme Cold Warning, dangerously cold wind chills as low as 20 to 25 below zero are expected," the NWS says. "For the Cold Weather Advisory, very cold wind chills as low as 10 to 19 below zero expected at times."

The frigid wind chills could cause frostbite on exposed skin "in as little as 30 minutes." The NWS recommends wearing layers, including a hat, face mask and gloves if you have to leave the house.

Central Illinois also experiencing 'dangerous' cold

Twelve different counties in central and east central Illinois are under an "Extreme Cold Warning" until 1 p.m. ET Sunday, according to the NWS Lincoln outpost.

A "Cold Weather Advisory" will then be in place from 1 p.m. ET today until 7 a.m. ET Monday.

"For the Extreme Cold Warning, dangerously cold wind chills as low as 30 below. For the Cold Weather Advisory, very cold wind chills as low as 20 below expected," the NWS said.

In addition to asking residents to layer up and wear hats and gloves if they have to go outside, the NWS encourages people to check on older family members, friends and neighbors, and exercise caution when using portable heaters.