The city’s air quality index score touched 1,758 at 12:30PM local time on Nov 18, according to IQAir, which collects global pollution data. A level below 101 is considered acceptable, and scores above 300 are regarded as hazardous.
The concentration of PM2.5 – particulate matter measuring 2.5 microns or less in diameter that can be carried into lungs, causing deadly diseases and cardiac issues – was 130.9 times the World Health Organisation's recommended levels.
Pakistan has also faced record levels of smog over the past week and seen officials take action, including the closure of schools.