Mayor Brandon Johnson holds a joint online news conference on Dec. 27, 2023, with the mayors of New York City and Denver on the migrant crisis. (Credit: Chicago Mayor’s Office)

The comments came during a joint online press conference Wednesday afternoon with Chicago Mayor Brandon Johnson,  New York City Mayor Eric Adams and Denver Mayor Mike Johnston.

A Man talks on his phone as he looks through the haze at the George Washington Bridge from Englewood Cliffs, N.J., Wednesday, June 7, 2023. (AP Photo / Seth Wenig)

While Canadian officials asked other countries for help fighting more than 400 blazes nationwide that already have displaced 20,000 people, air quality with what the U.S. rates as hazardous levels of pollution extended into central New York.

Brian Hackel, right, an overdose prevention specialist, helps Steven Baez, a client suffering addiction, find a vein to inject intravenous drugs at an overdose prevention center, at OnPoint NYC in New York, N.Y., Friday, Feb. 18, 2022. (AP Photo / Seth Wenig)

Supporters say the sites — also known as safe injection sites or supervised consumption spaces — are humane, realistic responses to the deadliest drug crisis in U.S. history. Critics see them as illegal and defeatist answers to the harm that drugs wreak on users and communities.

The second installment of WTTW's "10 That Changed America" premiers Tuesday. This time, host Geoffrey Baer looks at 10 American parks that changed how we live and play in our cities.