When will Chicago’s wildfire smoke finally clear? Here’s when you’ll actually be able to breathe easier.

If it feels like Chicago has been living inside a campfire for the past two days, you’re not imagining it.

After some of the worst air quality on the planet on Thursday, the city woke up Friday still shrouded in thick Canadian wildfire smoke, with Air Quality Index (AQI) readings remaining in the “hazardous” range across much of the region. The Illinois Environmental Protection Agency’s Air Quality Alert remains in effect through midnight Friday and health officials continue to urge everyone (not just people with asthma or other respiratory conditions) to limit time outdoors.

But relief is finally on the horizon. According to NBC 5 Storm Team meteorologist Alicia Roman and ABC7 meteorologist Tracy Butler, shifting winds are expected to begin pushing the densest smoke eastward today, with air quality gradually improving through the afternoon and evening. That doesn’t mean conditions will suddenly be good—forecasters say Chicago will likely remain in the “unhealthy"”(red) category later on—but it’s a significant improvement from the hazardous conditions that blanketed the city overnight.

Saturday is expected to bring the cleanest air Chicago has seen in days, with AQI levels potentially dropping into the “moderate” range. Unfortunately, the break may be short-lived. As winds shift again on Saturday night, lighter wildfire smoke could drift back into northern Illinois, bringing hazy skies into Sunday, though forecasters say it shouldn’t be nearly as severe as this week’s event.

The smoke has already upended life across the city. The Chicago Park District closed beaches and outdoor pools for a second straight day while moving summer camps indoors. Six Flags Great America and Hurricane Harbor also remained closed Friday, along with the Morton Arboretum’s outdoor grounds. Earlier this week, Millennium Park concerts, a Chicago Fire match and other outdoor events were postponed or rescheduled because of the hazardous air.

Travel has also been affected, with reduced visibility creating the potential for delays at O’Hare International Airport. Drivers may notice another side effect if showers develop later this afternoon: so-called “dirty rain,” when raindrops pull smoke particles from the atmosphere and leave behind a layer of soot on cars, windows and outdoor furniture. While rain can temporarily improve visibility, meteorologists say a prolonged rainfall combined with a sustained shift in wind direction is what will truly clear the smoke.

This week’s air pollution has also been historic. The Environmental Protection Agency told CBS Chicago that the peak AQI values recorded this week exceeded anything measured in the Chicago area since reporting began in 1999, including the Canadian wildfire smoke event of 2023. Some locations topped AQI readings of 400 and Wheaton briefly recorded readings above 500, placing conditions well into the hazardous category.

Until conditions improve, public health officials recommend staying indoors with windows closed, avoiding strenuous outdoor activity and wearing a well-fitting N95 mask if you need to be outside for an extended period. Contact lens wearers may also want to switch to glasses temporarily, as smoke particles can become trapped beneath lenses and irritate the eyes.

If you’ve got weekend plans, you probably don’t need to cancel them just yet. But it’s worth checking the AQI before heading out, because in Chicago this weekend, the weather forecast comes with an asterisk: the smoke isn’t quite finished with us.