Mumbai experienced cooler temperatures on December 26, 2025, with a pleasant winter chill. However, the city's air quality remained a significant concern, with the overall Air Quality Index (AQI) recorded at 277, categorized as 'unhealthy'. Specific areas like Wadala Truck Terminal registered a severe AQI of 384. Infrastructure projects and traffic emissions are identified as primary contributors to the persistent pollution, posing health risks to vulnerable populations.