The residents of Delhi-NCR woke up to severe cold, haze, and 'hazardous' air quality on Tuesday, with most AQI stations touching 500-mark (severe plus). According to the Central Pollution Control Board (CPCB),

While a thick blanket of haze covered the National Capital Region (NCR) for the sixth day in a row, the air quality in Delhi, Noida, Ghaziabad, and Gurugram reached "alarmingly high" levels. Even on Tuesday morning,

Residents in India's northern states woke up to another day of poor air quality on Tuesday, as a layer of dense fog shrouded most of the region, and pollution in the capital Delhi remained severe.

The smog, a toxic blend of smoke and fog, happens each year in winter as cold air traps dust, emissions, and smoke from illegal farm fires in some surrounding states. Visibility dropped to 100 m (109 yards) in Delhi and Chandigarh,

By Tanvi Mehta NEW DELHI (Reuters) -Toxic smog engulfed much of northern India on Monday and pollution readings in New Delhi hit their highest of this pre-winter season, after dense fog overnight. Visibility dropped to 100 metres in the capital and at least eleven flights were diverted.