Delhi: Fog disrupts flight operations at IGI airport; air quality remains'severe'

It was a cold foggy Tuesday morning in the national capital with visibility dropping to 50 metres affecting flight schedule and causing cancellation of over 300 trains. The air quality in Delhi-NCR remained 'severe' for the fourth consecutive day as high humidity, low wind speed and drop in mercury prevented the dispersal of particulate matters. At 8.30 a.m., the humidity was 100 per cent; visibility dropped to 50 metres at Palam with a spate of flight delays at the Delhi airport.