Even as the national capital woke up to toxic air on Monday morning with the Air Quality Index (AQI) falling to the "very poor" category, health experts warned an increase in respiratory diseases, stroke, and heart attack, among others. 

According to the Central Pollution Control Board (CPCB), Delhi recorded an Air Quality Index (AQI) of 335 at 8 am on Diwali morning after people burst crackers on the eve of the festival of lights, causing severe noise pollution and blanketing Delhi-NCR in smoke.