An apocalyptic 'wall of dust' is set to blanket Chicago after severe storms ripped through the Midwest leaving at least 23 people dead and millions without power.

A terrifying dust cloud descended onto the Chicago area as residents were choked and blinded by the 100-mile line of dust from southwest Chicago to northern Indiana.

The rare event shocked forecasters and locals after a dust storm warning was issued by the National Weather Service for only the second time in history.

'This looks like a bad thunderstorm coming through, but you can tell that it's just not a thunderstorm. It's dust. It's straight up dust,' resident Thomas Jean-Mastej told CBS News.

After numerous incidents occurred due to the severe lack of visibility, NWS urged residents to stay indoors and only travel when 'absolutely necessary.'