Delhi recorded air pollution more than 17 times above an acceptable level as worsening smog triggered curbs on trucking and shuttered construction sites and schools.

India's capital city of Delhi has virtually shut down as air pollution hit "severe plus" levels, according to Indian government officials in its pollution control authority.

with a current air quality index (AQI) near 500. According to the forecast, air quality will remain very poor through the rest of the week. HOW IS AIR QUALITY MEASURED? SAFAR is warning everyone in Delhi to stay indoors and avoid all activity outside.