DELHI: A low-pressure system brewing in the southeast Bay of Bengal is poised to deepen rapidly, prompting the Indian Meteorological Department (IMD) to issue urgent alerts for heavy rainfall across southern coasts and prolonged spells of dense fog along the northern regions. Meteorologists are closely monitoring this disturbance, which is expected to transform into a deep depression within hours before shifting west-northwest.

The southern state of Tamil Nadu is bracing for isolated very heavy showers and thunderstorms, with peak activity expected on January 9 and 10. Similarly, Kerala and Mahe residents should prepare for significant downpours by the tenth. Fishermen have been warned to steer clear of the southeast and southwest Bay of Bengal areas due to the impending rough sea conditions. Coastal districts are advised to take precautionary measures against potential flash floods and power disruptions as heavy rains roll in.

Meanwhile, a blanket of dense to very dense fog has settled over northwest, central, and northeast India, drastically reducing visibility to under fifty meters in some areas. The Delhi National Capital Region (NCR) is expected to face moderate to dense fog starting January 8, affecting daytime temperatures which are projected to hover between 15 to 18 degrees Celsius, with nights dipping to six to ten degrees. States like Punjab, Haryana, Rajasthan, and Uttar Pradesh are grappling with cold day conditions, as temperatures plunge three to five degrees below normal.

Cold wave warnings remain in effect for the northern plains, where strong winds and clear skies are suppressing temperatures. Some areas in Rajasthan and Madhya Pradesh could see temperatures plummet below four degrees Celsius, increasing the risk of hypothermia for outdoor workers and the homeless. In response, authorities are distributing blankets and setting up warming shelters, urging citizens to limit exposure during peak hours of the chill. The agricultural sector is also on alert, as potential damage looms for standing winter crops exposed to frost.

In addition to the severe weather, Delhi's air quality index is currently around two hundred seventy-nine, categorized as poor due to winter stagnation, which traps pollutants in the atmosphere. This combination of fog and smog intensifies health risks, particularly for children, the elderly, and those with pre-existing conditions. The IMD stresses the importance of real-time monitoring and color-coded alerts to guide public response amidst these challenging climatic conditions.

As the country's heavy monsoon surge aligns with usual cyclone breeding grounds, southern states are reinforcing embankments, while northern regions are stocking up on essentials to prepare for prolonged fog and the possibility of cold snaps.