Last updated at 12:14
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Freezing conditions return to Midwestern states in America

Temperatures below freezing have returned to Midwestern states in the US.
Temperatures below freezing have returned to the some parts of the US. It's so cold steam is rising from Lake Michigan in Chicago.
Steam rising from Lake Michigan in Chicago.
Downtown in Chicago, blocks of ice float in the Chicago river.
Ice in Chicago river
Thousands of children are off school because they've been closed during the cold snap.
Skyline in Chicago
People have been told to brace themselves for temperatures that could get as cold as -40C with wind chill.
People walking through train station in Chicago.
Conditions on roads and motorways are dangerous and people warned not to drive.
Cars on snow covered road
Severe weather warnings are not keeping everyone inside though.
Person running by Lake Michigan in Chicago.
A lifeguard stand is surrounded by snow at a beach in Lake Calhoun, Minneapolis.
Lifeguard stand is surrounded by snow at a beach in Lake Calhoun, Minneapolis.
In Pennsylvania, a woman walks her dog in a field covered with snow rollers.
A woman walks her dog in a field covered with snow rollers
Snow rollers are created when large chunks of snow are formed naturally, gathering up more snow as they're swept along by the wind.
Snow rollers in field.