If you struggle with your breathing on a regular basis, you may want to consider reducing the amount of time you spend outdoors this weekend. The Wisconsin Department of Natural Resources has issued an Air Quality Advisory for Ozone until 11 p.m. Friday night thanks to favorable meteorological conditions and the Canadian wildfires that have been plaguing the area for weeks. Peak ozone concentrations are expected to take place between 10 a.m. and 10 p.m., causing the air quality index to reach the “unhealthy for sensitive groups” level and potentially the “unhealthy” level.  During peak times, people with lung diseases like asthma, children, older adults, and people who are active outdoors should reduce or consider avoiding heavy activity. Even once the warning expires, the smoke and the haze is expected to stick around, causing poor air quality later into Saturday.