Delhi chokes under thick smog: AQI hits ‘severe’ in some areas; flights, train services hit

Delhi grappled with severe smog on Sunday, triggering stringent anti-pollution measures and widespread air travel chaos. Authorities activated Stage-IV of GRAP as Air Quality Index levels soared into 'very poor' and 'severe' categories. Over 500 flights faced delays and 138 were cancelled due to drastically reduced visibility, impacting thousands of passengers.