NEW DELHI: Residents of Delhi woke up to hazardous air quality on Sunday as a thick blanket of toxic smog and fog engulfed the Indian capital region, pushing air pollution into “severe” levels for the first time this year. Home to 30 million people, Delhi has not recorded a single “clean air” day since September 2023, with Air Quality Index readings hitting high above the 50 score throughout the past two years. On the AQI scale from 0 to 500, good air quality is represented by levels below 50, while levels above 300 are dangerous.