The wildfire smoke contains harmful gases and fine particulate matter that can penetrate deep into the lungs, posing serious health risks. Sensitive groups, including individuals with heart or lung conditions, older adults, children, and outdoor workers, are particularly vulnerable. Air quality in areas like Boise, Idaho, has reached 'very unhealthy' levels, prompting advisories for residents to limit outdoor activities. Prolonged exposure to wildfire smoke can lead to cardiovascular and respiratory issues, and experts warn that wildfire smoke is significantly more toxic than typical air pollution.