New Delhi, Dec. 30 -- Delhi woke up to a heavy blanket of dense fog and toxic air on Tuesday morning, as visibility in significant areas such as the Dwaraka Expressway, Dhaula Kuan and Indra Gandhi International Airport plummeted to near-zero levels. The India Meteorological Department (IMD) has issued an orange alert for dense fog, warning residents of sharply reduced visibility and challenging travel conditions for the next few days.

In addition to the weather, Delhi's air quality remained in the very poor category, with an AQI of 384, prompting authorities to advise residents to limit outdoor activities.

Delhi's Indira Gandhi International Airport issued a passenger advisory at 7 am on Tuesday, stating that flight operations are runn...