As per reports, Environment Canada issued a weather alert for Calgary at around 0430 hours (local time) on Thursday (25 July) morning, warning that wildfire smoke is expected to cause poor air quality for the area.

• The Air Quality Health Index (AQHI) forecast for the city showed that conditions were expected to reach 10+ on the scale on Thursday (25 July), representing a potentially very high health risk.
• The fine particles in wildfire smoke are reported to be of particular concern.