The Air Quality Index (AQI) now falls into the "extremely severe" category, posing serious health risks to millions of residents.
The toxic smoke and haze caused by the excessive pollution have reduced visibility to just 150 meters, disrupting flights and train services in the city.
These include a ban on all trucks and vehicles not using clean energy fuel from entering New Delhi, and advisories for vulnerable groups, such as children, the elderly, and individuals with respiratory or cardiovascular diseases, to stay indoors. Face-to-face education for all students except for those in grades 10 and 12 has also been suspended.
India's pollution levels are classified into four categories: "very low," "low," "severe," and "extremely severe."
With air quality now categorized as "extremely severe," the Graded Response Action Plan (GRAP) has been activated, banning activities such as the use of coal, wood, and diesel generators, except in emergencies.