Delhi is currently experiencing a severe cold wave, prompting the India Meteorological Department (IMD) to issue a yellow alert for the next two days. The alert forecasts moderate to dense fog and warns of worsening weather conditions due to a sharp drop in temperatures across Delhi-NCR.
On Saturday, Delhi recorded its coldest morning of the winter season, with the minimum temperature at the Safdarjung Observatory plummeting to 4.2 degrees Celsius. This marks the lowest January reading in the last three years. The maximum temperature also remained below normal at 19.7 degrees Celsius, exacerbating the winter chill. According to the IMD, a cold wave is declared when the minimum temperature falls below 10°C and is at least 4.5°C below normal.
The biting cold has raised concerns about health risks, especially for vulnerable populations. Medical professionals have warned of increased risks of respiratory illnesses and cardiovascular problems due to the low temperatures. Dr. Anita Sharma, a cardiologist in Delhi, advised individuals with hypertension and heart conditions to take extra precautions, as cold weather can constrict blood vessels and increase blood pressure. Hospitals are advising the elderly and those with pre-existing conditions to stay indoors and keep warm. The Health Department has issued guidelines urging residents to dress in layers, avoid outdoor activities during peak cold hours, and ensure proper heating in their homes.
Adding to the weather woes, Delhi's air quality has deteriorated, remaining in the "very poor" category. On January 9, 2026, the Central Pollution Control Board (CPCB) recorded an Air Quality Index (AQI) of 345. On New Year's Day, the AQI stood at a toxic 371, with some neighborhoods breaching the "severe" 400 mark. Air quality is expected to remain in the "very poor" category for the next several days. The combination of low temperatures and humidity has created a haze that traps pollutants near the surface, despite persistent wind speeds.
The Air Quality Early Warning System has indicated that Delhi's air quality is expected to remain in the "poor" to "very poor" range in the coming days. The ventilation index, which is an indicator of how easily pollutants can be dispersed, is forecast to be unfavorable.
The cold wave and poor air quality are disrupting daily life in Delhi. There have been reports of delays in public transport and increased energy consumption due to heating requirements. Vendors selling warm food and beverages have seen a spike in sales. Dense fog has also disrupted air travel, with reduced visibility causing flight delays.
Authorities are urging citizens to be vigilant and take necessary precautions to protect themselves from the cold and pollution. The IMD has forecast mainly clear skies until Tuesday, but has warned of the possibility of cold wave conditions in isolated places.
