Delhi has received over 200 per cent excess rainfall in the pre-monsoon period — March 1 to May 31 — so far due to back-to-back western disturbances in the last two weeks. The Safdarjung Observatory, Delhi’s primary weather station, has recorded 221 per cent more precipitation (119 mm against a normal of 37.1 mm) during this period. Normally, it logs 48 mm of rainfall during the entire pre-monsoon period.