Commission for Air Quality Management (CAQM) revoked Graded Response Action Plan (GRAP) Stage 4 restrictions across Delhi-NCR on Thursday as light rain improved air quality in the region. However, measures under GRAP Stages 1, 2 and 3 will remain in force to manage pollution levels. The CAQM had invoked GRAP-4 curbs on Wednesday after AQI reached 396 in the evening.