Mundka air quality at 919: Delhi-NCR chokes due to 'severe-plus' AQI, GRAP-4 measures imposed; 'orange' alert for fog

Delhi and NCR woke up to hazardous air quality on Monday, with the AQI exceeding 500 in several areas. The severe pollution prompted authorities to implement Stage IV of the Graded Response Action Plan (GRAP), leading to stricter measures to combat the crisis. Flight operations were also affected due to low visibility.