Delhi is experiencing a cold wave with minimum temperatures around 7.4 degrees Celsius and foggy mornings. Air quality has worsened, with the Air Quality Index (AQI) fluctuating between 'poor' and 'very poor' categories, reaching as high as 307 in some areas. Despite the smog, Republic Day parade rehearsals are ongoing. Authorities have lifted Stage-III Graded Response Action Plan (GRAP) restrictions but urge adherence to Stages I and II to prevent further pollution.