The air quality in several parts of Delhi remained in the severe category on Saturday, November 16, while a dense layer of smog continued to envelop the national capital, Noida, Ghaziabad, Gurugram and other areas of NCR for the fourth consecutive day.

Every year, Delhi and northern states battle hazardous air during the winter months of October to January due to plummeting temperatures, smoke, dust, low wind speed, vehicular emissions and crop stubble burning. This time, experts say that the condition is likely to get worse in the coming days.

Delhi recorded the worst air quality in India on Wednesday with a severe AQI of 418 while Noida and Gurugram also faced very poor levels.