A cold weather advisory was in effect Saturday to Monday across all of north and central Illinois. Wind chills in Chicago could hit minus 22 Sunday and minus 21 Monday. City officials are urged to expand capacity at warming centers and keep them open 24 hours.

Dangerously cold weather is expected Monday and Tuesday, bringing single-digit temperatures to Northwest Indiana and Northern Illinois accompanied by negative wind chills of -20 degrees or worse.

President-elect Donald Trump’s incoming border czar vows that the biggest city in the Midwest will be “ground zero” for mass deportations, and officials across the political spectrum in Chicago are bracing for a showdown.

Since Trump’s victory in November, the American Business Immigration Coalition has held several dozen in-person and virtual training sessions with more than a thousand employers to prep for the sweeps.