Wildfire smoke from northwestern Ontario has pushed air quality in Grey-Bruce to the highest possible risk level, according to Grey Bruce Public Health. On Wednesday, July 15, 2026, the Air Quality Health Index, or AQHI, hit 10-plus across the area, a reading that signals very high health risk for everyone. A Yellow-level heat warning is also in effect as humidity makes it feel like more than 30 degrees Celsius.
The smoky conditions are coming from more than 100 wildfires burning in northwestern Ontario. Environment Canada issued both an Orange-level air quality warning and a Yellow-level heat warning for Grey-Bruce and much of southern Ontario. An Orange-level warning means significant disruption or health impacts are likely.
Residents in Hanover and surrounding communities are being told to limit outdoor activity and keep windows closed to stay safe. Using air purifiers with HEPA filters or recirculating air on HVAC systems can help reduce smoke inside homes. If the heat becomes too much, people can visit community centres, libraries, or shopping malls where the air is filtered and cooler.
“If you really have to choose one or the other, we do recommend prioritizing the heat effects on your body,” said Environment Canada meteorologist Kate Leclerc. She added that opening a window to cool down is okay if needed in each person’s situation.
The AQHI is expected to stay at 9, which is still high risk, through Thursday before possibly improving Friday morning. Nearby, the Hanover and District Hospital operates a 24-hour emergency department for anyone who needs urgent medical help during the poor air quality.
