Dense Fog and Cold Wave Cause Flight Delays and Poor Air Quality in Delhi-NCR

Delhi-NCR experienced dense fog and a cold wave on January 17, 2026, causing severely reduced visibility and delays in flights at Indira Gandhi International Airport. Minimum temperatures hovered around 4.3-4.4°C, below seasonal averages, with forecasts indicating gradual warming followed by another cold spell later in the month. Air quality remained poor to severe, prompting the reimposition of Stage 3 Graded Response Action Plan (GRAP) restrictions. Road and rail traffic were also affected, while authorities advised caution and monitoring of weather updates.