India's capital region of Delhi has virtually shut down as air pollution hit "severe plus" levels, according to Indian government officials in its pollution control authority Delhi's Chief Minister Atishi Marlena said that all of northern India was in the middle of a "medical emergency.

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 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),