Usually, when it’s very cold in Chicago, the weatherperson says that we’re inundated by “cool Canadian air”. Now our Canadian friends are sending us something worse: smog from the extensive wildfires up north. Yesterday Chicago had the worst air quality in the world. Here’s our index from the NYT:Here are the air quality indices for several major cities this morning. More from the NYT:In Chicago, Air Force One descended through a thick layer of smoke and haze at the O’Hare International Airport late Wednesday morning, as President Biden arrived for a speech on the economy.

Source: Washington Post June 29, 2023 00:19 UTC