When light meets haze: Delhi awaits Diwali under a choking sky

As Diwali approaches, Delhi is already covered by thick haze and poor air quality. The city’s Air Quality Index (AQI) has reached alarming levels, with areas such as Anand Vihar recording readings around 384, which falls in the ‘very poor’ category. Residents are struggling with breathing difficulties, and visibility across the city has dropped.

Officials and experts say the major causes of this pollution are vehicle emissions, construction dust, and stagnant weather conditions. Low wind speed and cooler temperatures are trapping pollutants close to the ground, making it harder for the air to clear. On top of this, nearby states such as Punjab and Haryana have begun burning crop stubble, a seasonal practice that adds thick smoke to Delhi’s already polluted air.

The Supreme Court has allowed the use of ‘green’ fire-crackers for Diwali — those certified by the National Environmental Engineering Research Institute (NEERI) and the Petroleum & Explosives Safety Organisation (PESO). However, these can only be used for a limited time. Experts fear that if people use both green and traditional fire-crackers, pollution levels may rise even further during the festival.

Authorities are now stepping up anti-pollution measures. From 1 November, heavy and polluting commercial vehicles will be banned from entering Delhi. The government has also warned officials in neighbouring states that they will face strict action if they fail to stop stubble burning.

Despite these measures, Delhi is bracing itself for a Diwali under a “choking sky”, as the festive lights are set to glow through layers of haze and smog. The city’s joy and celebrations are once again overshadowed by health concerns and environmental worries.

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