Smog and pollution force closure of schools in Delhi-NCR, IMD predicts very dense fog on Wednesday Smog and pollution force closure of schools in Delhi-NCR, IMD predicts very dense fog on Wednesday The Air Quality Index Of Delhi Touched The Severe Level Of 451 Where Anything Above 100 Is Considered Unhealthy. News Nation Bureau | Edited By : Tahir Qureshi | Updated on: 07 Nov 2017, 10:50:54 PM New Delhi : The India Meteorological Department (IMD) has predicted dense to very dense fog very likely in the morning hours of Wednesday over Punjab, Haryana, Chandigarh, Delhi, North Rajasthan and a few places in West Uttar Pradesh. Also, heavy rain is very likely at isolated places over Andaman & Nicobar Islands and south Tamil Nadu on Wednesday.