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On Tuesday morning inhabitants of this heavily contaminated metropolis found themselves inhaling severely hazardous air that was classified as the "critical" range.

Alarming Pollution Readings

Several parts of Delhi showed an AQI above 500, which represents a tenfold increase over the safe level established by the World Health Organization.

Particular areas, levels of dangerous airborne particles hit highs of 1800, representing fifteen to twenty times above acceptable limits.

Firecracker Restrictions and New Developments

For the past four years, authorities had enforced a complete ban on the purchase and ignition of fireworks during the Festival of Lights due to their substantial impact to the dangerous haze that engulfs the capital as colder weather begins.

Nevertheless earlier this year, the newly elected city leadership approached the judicial authority to seek a easing of the prohibition.

They proposed allowing "green crackers" – previously criticized by environmental experts as being only about 30% lower impact – as a compromise between "heritage and public health".

Legal Ruling and Reality

Despite concerns of public health and environmental advocates, the court approved the proposal, mandating that environmentally conscious fireworks could be used during specific hours throughout the Diwali.

On Monday night, there was widespread flouting of the regulated periods across the city, with little regulation regarding whether the fireworks being used were actually the eco-friendly type.

Several recording stations throughout the capital recorded air quality spiking around midnight to the most severe measurements seen during Diwali in at least recent memory.

Regional Implications

Extensive ignition of firecrackers during Diwali also initiated a dispute with adjacent the neighboring country, with representatives in Pakistani Punjab province partially attributing deteriorating atmospheric conditions in the city of Lahore on hazardous particles traveling from neighboring India following the celebrations.

Chronic Environmental Issue

Alarmingly severe levels of pollution in Delhi have continued as a major problem for fifteen-plus years, with the problem showing no improvement.

Around the festival period, the amount of toxic particles in the atmosphere has been observed to spike to significantly exceeding the most severe readings ever recorded in the Chinese city, which was formerly regarded as the globally most contaminated urban center.

Multiple Contamination Contributors

The situation in the city is resulting from a mix of multiple factors including transportation pollution, airborne particles, development work, rubbish burning and haze from farm burning in adjacent areas of Punjab and Haryana.

In these regions, farmers illegally ignite agricultural waste to expedite field preparation, producing dangerous haze that then gets trapped over the metropolitan area as colder air arrives.

Medical and Financial Toll

The economic and health toll on the approximately 33 million inhabitants living in the Delhi area is significant, according to numerous research.

This pollution leads to increased incidence of neurological, heart and circulatory and lung diseases, and can even lead to malignancies.

Air quality crisis is calculated to be responsible for ten thousand untimely fatalities annually in the city.