Areas worst affected by pollution in Delhi NCR after Diwali

Partly as a result of smoke from the firecrackers, the overall air quality index in Delhi jumped to 574 which falls in the "severe-plus emergency" category, according to data by the Centre-run SAFAR (System of Air Quality and Weather Forecasting And Research).
The sharp spike in pollution is caused by rampant burning of firecrackers that has led to the formation of a smoky layer across the national capital and drastically reduced visibility, the authorities said.