Chicago`s air quality: ‘We`re in the crosshairs.` Wildfires and wind push region`s air to worst in the world, global pollution index shows.
(Chicago Tribune Religion News)

Health officials said Chicagoans should take these precautions: Avoid strenuous outdoor activities, keep outdoor activities short, consider moving physical activities indoors or rescheduling them, consider wearing masks, run air purifiers and close windows.