Residents of Delhi-NCR are likely to experience worsening air quality in the days following Diwali, with a significant increase in the number of severe air days. This could lead to health risks, particularly for individuals with respiratory conditions, children, and the elderly. The combination of firecracker emissions and seasonal weather patterns, including low temperatures and stagnant air, exacerbates pollution levels. The AQI may reach hazardous levels, impacting outdoor activities and overall public health.