Air quality at hazardous levels as toxic smog blankets New Delhi

People walk in the smog in New Delhi (Piyush Nagpal/AP)

Dense toxic smog blanketed India’s national capital on Monday, pushing air pollution levels to their worst levels in weeks, disrupting travel and causing authorities to impose the strictest containment measures.

More than 40 flights were cancelled and several dozen delayed. More than 50 trains arriving and departing from New Delhi were delayed by several hours, authorities said.