Heavy rainfall in southern states could lead to localised flooding, waterlogging, and disruptions in daily life, particularly in Tamil Nadu, Puducherry, and Karaikal. Thunderstorms and gusty winds may pose risks to infrastructure and transportation in affected areas, including Kerala, Mahe, and Coastal Andhra Pradesh. In Delhi, air quality has deteriorated significantly, with the average Air Quality Index (AQI) reaching 376 ('Very Poor') on Sunday. Early Monday readings indicate 'Severe' pollution levels in several areas, exacerbated by low wind speeds and post-Diwali emissions. Prolonged exposure to such pollution levels could lead to respiratory and cardiovascular health issues.