Chicago Air Quality Worsens Into Sunday as Smoke Returns and 90s Heat Fuels Storm Risk
Updated
Updated · NBC Chicago · Jul 18
Chicago Air Quality Worsens Into Sunday as Smoke Returns and 90s Heat Fuels Storm Risk
3 articles · Updated · NBC Chicago · Jul 18
Summary
Chicago’s air quality improved to moderate-to-good levels Saturday morning, but forecasters said a new smoke plume will arrive this evening and degrade conditions overnight into early Sunday.
Upper-level wildfire smoke should keep skies hazy even if much of it stays aloft, with air quality still turning unhealthy at times for people with breathing issues.
A front moving through the region also brings a narrow storm window Saturday, with thunderstorms developing around noon and sliding south between 2 p.m. and 4 p.m.
The Storm Prediction Center has the area under a marginal to slight severe-weather risk, with damaging winds, hail and heavy downpours possible as highs reach the low 90s.
Sunday should stay hazy with highs in the low 80s, while another round of storms could arrive late Monday into Tuesday before cooler midweek temperatures.
As Canadian smoke chokes US cities, is North America prepared for a future of cross-border climate disasters?
Health experts advise high-tech filters, but is 'safe air' becoming a luxury only the wealthy can afford?
As wildfires erase entire communities, what happens to the people and cultures displaced by these climate-fueled catastrophes?
Record-Breaking Air Pollution in Chicago: The 2026 Wildfire Smoke Emergency and Its Lasting Health Impact
Overview
In mid-July 2026, Chicago and the surrounding Midwest faced a severe air quality crisis as dense wildfire smoke from over 100 fires in northern and western Ontario drifted into the region. This led to widespread air quality alerts and Milwaukee experiencing its worst air quality on record. The thick smoke reduced visibility and discouraged outdoor activities, with many residents staying indoors. The hazardous haze persisted for several days, highlighting the far-reaching impact of distant wildfires and the growing challenges posed by climate change on public health and daily life in major cities.