The latest spike coincides with a sharp rise in stubble burning cases in Punjab, which reported 442 farm fires on Saturday -- the highest single-day count so far this season

Despite Delhi's severe "very poor" air quality, experts note the usual spike in pollution from farm fires in Punjab and Haryana has not yet happened. Its contribution has been minimal, peaking at just 2.6%, meaning the current smog is from local sources like vehicles and industry. This delay is attributed to floods disrupting the harvest and unfavourable wind patterns, pushing the expected surge in smoke to after October 28th.

The contribution of stubble burning in neighbouring Punjab and Haryana has remained negligible this season – below 1% on most days, and peaking at just 2.6%