Lahore has slipped to second place in the global pollution rankings, with New Delhi overtaking the city to claim the top spot as the world’s most polluted on Friday. The air quality index (AQI) in Lahore has reached hazardous levels, with readings soaring to 780 AQI, signaling a significant environmental and public health crisis.

The crisis has prompted a flurry of responses from local authorities, as the country grapples with its most severe air pollution event in years. According to several Pakistani media reports the Punjab Provincial Disaster Management Authority had declared smog a “calamity” and instituted emergency measures.

Pakistan ’s smog situation has gone from bad to worse as air pollution rose to a record in Lahore. Sensors tracked by the Swiss monitor IQAir recorded an air quality index of 1,300 in the country’s second-largest city at 5 p.m. local time, the highest this year and well beyond a level of 50 that is deemed safe.

Toxic smog has shrouded Pakistan's eastern city of Lahore for days as surging pollution spurs authorities to curb activities and set up a panel to oversee preventive efforts. Here is a look at what causes the hazardous air,

Delhi surpassed Lahore as the world's most polluted city, with its air quality index reaching a 'severe' 418. The smog, a mix of fog and smoke, reduced visibility, causing flight diversions. Low wind speed,

Toxic smog has shrouded Pakistan's eastern city of Lahore for days as surging pollution spurs authorities to curb activities and set up a panel to oversee preventive efforts.