Civic authorities in Mumbai have imposed Graded Response Action Plan or GRAP IV curbs as air quality crossed 'very poor' and 'severe' thresholds in many areas. GRAP IV restrictions have been imposed in Mazgaon, Deonar, Malad, Borivali East, Chakala-Andheri East, Navy Nagar, Powai and Mulund. Brihanmumbai Municipal Corporation has halted construction and dust-generating activities in these areas.