The wildfire smoke has led to hazardous air quality levels in Illinois, particularly affecting sensitive groups such as individuals with heart or lung conditions, older adults, teens, and children. PM2.5 particles, which are small enough to penetrate deep into the lungs and bloodstream, pose significant health risks, including respiratory and cardiovascular issues. The Illinois Environmental Protection Agency has previously warned that outdoor activities could be dangerous for everyone during peak pollution events. Experts caution that these conditions may become more frequent due to climate change, potentially leading to larger wildfires in the Midwest within the next decade.