Stay informed with the LNN Daily Newsletter
(Image Credit: Dave Lueneberg | LNN)
AQHI readings spike at 7 or high

Air quality advisory issued as smoke levels climb in Lethbridge region, southern Alberta

Jul 23, 2026 | 6:55 PM

Environment & Climate Change Canada issued a Yellow Warning for Air Quality for much of southern Alberta late Thursday afternoon saying smoke is causing or expected to cause poor air quality and reduced visibility.

“As smoke levels increase, health risks increase. Limit time outdoors. Consider reducing or rescheduling outdoor sports, activities and events,” the weather agency said in a statement.

“You may experience mild and common symptoms such as eye, nose and throat irritation, headaches or a mild cough. More serious but less common symptoms include wheezing, chest pains or severe cough.”

The advisory came shortly after the Air Quality Health Index for the City of Lethbridge spiked at 7, or high, on a scale of ten-plus, after being at 6 earlier in the day.

Under the high-risk definition, the general population should consider reducing or rescheduling strenuous outdoor activities if they have symptoms like coughing and throat irritation.

The thick smoke that is now blanketing the region is coming from wildfires in both B.C and as far away as Washington State and could, potentially, linger depending on the direction of the wind.

The AQHI forecast for Thursday evening is predicting a level of 6, or moderate, but readings of 7 are expected to return on Friday.

For the latest readings and forecast for Lethbridge, please click here.