Gap Fill - Polar Vortex - Level 0


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   because      breathing      businesses      colder      dangerous      dangerous      eight      emergency      ice      icy      many      necessary      not      outside      people      rarely      skin      snow      temperature      wind  
It is than Antarctica in parts of the USA. This is of a polar vortex - freezing air and from the Arctic. This happens. There is a state of in many towns. Schools and have closed. People were told to travel. They were told not to go or breathe the air.

The in a part of Minnesota fell to -60º Celsius. The Chicago River and Niagara Falls turned to . The cold killed people. Officials told to go outside only if . Freezing air can be for the . It can cause problems. Shoveling can also be .

Try the Polar Vortex - Level 1 gap fill.

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