Delhi woke up to a hazy, smog-filled morning on Monday with the Air Quality Index shooting to frightening 900 in some areas. At Anand Vihar, PM 2.5 was hovering over 600. Whereas in RK Puram, it was at ‘severe’ level of 524. Major pollutant PM 2.5 was recorded at 500 in 'severe' category in Lodhi Road area. In neighbouring Ghaziabad, situation was no better. The city recorded PM 2.5 level of 500+ during early morning hours. In Uttar Pradesh’s Moradabad, the Air Quality Index (AQI) was registered at 340 in 'hazardous' category.