Norwood Park

It's "very unusual to have cold to this degree in December," meteorologist Edward Fenelon says.

The city has six warming shelters that offer residents a respite from the cold, officials said.

The units would be as small as 400 square feet but have "condo-quality" amenities, the developer said.

And thousands more, with their loud calls, flew over the city on Thursday.

In Your Neighborhood