New Delhi woke to toxic smog today after Diwali revellers defied a firecracker ban and risked jail to celebrate the annual Hindu festival.
International air monitor IQAir said harmful particles surged from PM 2.5 to 350 on the air quality index - more than three times as high as a day earlier.
The reading for the particulates - so tiny they can penetrate deep into the lungs and enter the bloodstream - is more than 23 times the recommended daily maximum set by the World Health Organization.
