Delhi-NCR Braces for 'Cold Day' Orange Alert; Mumbai Rains End, Fog Hits Flights

• IMD issues 'Orange alert' for 'cold day' in Delhi-NCR on January 2; cold wave expected until January 5.
• Mumbai's unseasonal rains cease; temperatures to remain 17-19°C, partially overcast skies predicted.
• Dense fog in Delhi-NCR affects visibility, leading to flight delays at IGI airport.
• Northern states like Himachal Pradesh, Punjab, Haryana, Chandigarh, Delhi, and Rajasthan to experience cold wave conditions.
• Kolkata faces prolonged winter cold and 'worst air quality'; South India (Chennai, Bengaluru) sees mild to warm weather.

Why It Matters: North India faces severe cold and fog, while Mumbai's unseasonal rains end; other regions see varied conditions.