In brief
On Saturday, Nov. 7 2026, Swiss air‑quality tracker IQAir rated Delhi as the world’s most polluted major city with a US AQI of 581, twice the level in Lahore. The Indian government responded by ordering online classes and encouraging remote work before the festival of lights, when firecrackers can further worsen the already high pollution levels. Official Indian monitors logged Delhi’s AQI at 363, in the very‑poor category, marking the worst pre‑Diwali air in eight years.
On the morning of Saturday, November 7, 2026, the capital city of Delhi found its air so thick that citizens were told to work from home and schools were switched to online classes as the government tried to protect people before the festival of lights.
Swiss air‑quality tracker IQAir reported that Delhi was the world’s most polluted major city at 10:35 a.m. local time, with a US Air Quality Index reading of 581. That number was more than double the 285 measured in Lahore, Pakistan, and far higher than most other cities on the global list.
Indian officials recorded a lower, but still alarming, value. The Central Pollution Control Board put Delhi’s air‑quality index at 363 at 10 a.m., categorising the conditions as “very poor.” That reading is still among the highest ever recorded in the city.
With the traditional festival of Diwali—a celebration that commonly involves widespread use of firecrackers—just a day away, the government ordered schools in and around Delhi to switch to online classes. It also urged businesses to encourage employees to work from home. The move was intended to limit human exposure to the worst air in eight years.
Fireworks are a staple of the holiday, but they add to the already toxic atmosphere. “The day after this, the lights will be all around the city, but with no clear view of the stars,” said a source familiar with the situation, noting how the bright displays can worsen pollution levels.
Part of the problem is seasonal. Winter in northern India brings cold, heavy air that traps vehicle emissions, construction dust, and smoke from crop‑waste burning. The cycle repeats each year, and Delhi has historically been top‑ranked for pollution during the winter months.
The trend is corroborated by other reports. A recent Gulf Times article noted that Delhi typically tops lists of the most polluted major cities every winter, according to the same Swiss tracker. The trend was a reminder to residents and newcomers of the growing threat to health and wellbeing.
The day before the flood of fireworks, a Facebook post by an English site reported that Delhi’s AQI had risen to 391 — a level that classified 30 monitoring stations as severe. A station in Rohini in the north of the city reported especially high readings.
While the numbers are frightening, not everyone in Delhi has been able to return to normal life. The government’s emphasis on remote work aims to reduce the number of commuters, but many people still need to be outside for their livelihoods. Those who work in construction, trades, and markets are still exposed to the same smog that Turkish hikers see at the bottom of the hills.
In the face of these odds, residents have adjusted. Cordoned sections of the city have restricted vehicular traffic, and many neighborhoods have set up makeshift air‑filter stations in basements, hoping to shield students and elderly families as they move online from school days. The government’s orders are a clear sign of the growing concern over health risks during the season.
For most Delhiites, the holiday continues with quiet vigils and an awareness that the lights should come from candles rather than from the firecracker‑laden night sky. The reorganization of schools, the push for remote work, and the widespread use of masks have become part of the city’s new normal as officials and citizens battle the most polluted sky the capital has ever seen.
