Chandigarh is experiencing a cold wave with night temperatures dropping to 5.6°C, 1.1 degrees below normal, according to the IMD. Dense fog is expected to persist, and an orange alert has been issued for Monday due to very dense fog and cold wave conditions. The city's air quality remains in the 'poor' category with an AQI of 223. Chandigarh is currently colder than several hill stations, attributed to a Western Disturbance affecting higher altitudes.