A thick blanket of smoke from Canadian wildfires is pushing southward across the US, prompting air quality alerts across Wisconsin, Minnesota, Michigan, and Connecticut. Millions of residents are advised to reduce outdoor exposure as air pollution levels reach unhealthy to very unhealthy levels,

Canadian wildfire smoke is again prompting a statewide Air Quality Alert with “unhealthy” air already across most of Minnesota according to the Pollution Control Agency. It’s also going to tie the longest stretch of unhealthy air in state history.