Extreme cold warnings have returned to the U.S., with dangerously cold temperatures expected in northern states.

The Arctic blast highlights the contrasting weather extremes gripping the country as wildfires burn up California and freezing winds in the Northeast.

The NWS extreme cold warning for Duluth said: "The dangerously cold wind chills as low as 40 below ... including a hat, face mask, and gloves. Avoid prolonged outdoor exposure.

Communities in the southwest corner of the province impacted by the weather alert include Pincher Creek, Waterton Lakes ...

An extended period of very cold temperatures is expected with dangerously cold wind chills as low as minus-25 degrees possible in northwestern Pennsylvania from late Sunday night through Wednesday ...

Those extreme wind chill values are expected to end later ... people working or exercising outdoors and those without proper shelter face a greater risk in the cold. It also reminded people ...

But do we wrap ourselves in scarves, neck gaiters, earmuffs, or fleece face protectors ... 25 or lower in the west. Extreme Cold Watch/Warning: Air temperature or wind chill down to -30 or ...

Now, Harrison fears for those who could face even more threatening ... “And then when wind does start, stay away from trees, windows. And use extreme caution, again, with anything that could ...

All of Wisconsin was under an Extreme Cold Warning Tuesday morning due to wind chills as cold as -35 ... "Dress in layers including a hat, face mask, and gloves if you must go outside," the ...

Milwaukee will kick off this week with the most extreme cold of the winter so far. During the coldest periods, wind chill is forecast ... especially your face, hands and feet.