Air quality in Delhi continues to be in the 'severe' category, with the Air Quality Index (AQI) recorded at over 450 in some locations this morning. Some of the worst affected areas are RK Puram (453), Punjabi Bagh (444), ITO (441) and Anand Vihar (432). The national capital remained shrouded in a blanket of toxic smog, prompting doctors to raise concerns about the growing number of respiratory and eye ailments among children and the elderly.