The poor air quality poses significant health risks, particularly for sensitive groups such as individuals with heart or lung conditions, older adults, children, and those with diabetes. Prolonged exposure to fine particulate matter can exacerbate respiratory and cardiovascular issues. Residents in affected areas, including Northwest Indiana and parts of Illinois, are advised to limit outdoor activities, especially strenuous ones. The situation is expected to improve slightly by Tuesday, with forecasts predicting moderate air quality levels as winds shift and potential rain showers help disperse the smoke.