In Pics: Delhi Wakes Up To Season's Worst AQI

A thick layer of smog - a toxic blend of smoke and fog - enveloped the Delhi-National Capital Region (NCR) this morning as the air quality index (AQI) plummeted to the "severe-plus" category, forcing authorities to announce stricter pollution control measures

An aerial view shows Jama Masjid engulfed in thick smog, as Delhi wakes up to season's worst air quality index

Pedestrians walk across a street on a cold smoggy morning in New Delhi on November 18

People walk past dogs during their morning walk along the Kartavya Path engulfed in smog, near India Gate

Thick smog engulfs the Kartavya Path near India Gate in New Delhi on November 18

Tourists visit Jama Masjid amid thick smog. The National capital recorded season's worst AQI this morning

Thick smog engulfs the Red Fort as Delhi is choked in a blanketing toxic smog

A woman wearing a mask walks along a roadside on a cold smoggy morning in New Delhi

A cyclist with his face covered in cloth rides along a street on a cold smoggy in the national capital