Delhi AQI Hits 'Severe' at 462; GRAP-4 Imposed Amid Toxic Smog

• Delhi's AQI reached a "severe" level of 462 on Sunday morning, with some areas nearing 500.
• The Commission for Air Quality Management (CAQM) implemented GRAP-4 across Delhi-NCR due to the deteriorating air quality.
• GRAP-4 imposes stricter restrictions, including a ban on diesel-powered medium/heavy goods vehicles (with exceptions) and a complete halt to all construction and demolition activities.
• Other GRAP-4 measures include closing industries using non-approved fuels, banning diesel generator sets (except for essential services), and prohibiting open burning.
• The CAQM attributed the worsening AQI primarily to a weak Western Disturbance slowing wind flow, rather than local emissions.

Why It Matters: Delhi's toxic air (AQI 462) forces GRAP-4, endangering health with severe pollution.