- Toxic smog enveloped Delhi following Diwali celebrations, with private monitors recording air quality index levels exceeding 2,000 in parts of the Indian capital.
- Levels of cancer-causing PM2.5 micro-particles reached 879 microgrammes per cubic metre in one locality, nearly 59 times the World Health Organization's daily recommended limit.
- The severe surge in pollution occurred despite Supreme Court restrictions limiting firework usage to specified three-hour windows and approved green firecrackers.
- The annual winter crisis was exacerbated by stagnant atmospheric conditions, vehicular emissions, and stubble burning in neighbouring states such as Punjab and Haryana.
- Authorities have ordered schools in and around the capital to switch to online classes and encouraged residents to work from home.
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