A highly unusual monsoon season this year has yielded 1,100 mm of rainfall in Delhi so far, the highest in 46 years, and almost double the precipitation recorded last year, the India Meteorological Department (IMD) said on Saturday. “The Safdarjung Observatory, which is considered the official marker for the city, had gauged 1,150 mm of rainfall in the 1975 monsoon season. This year, the precipitation has already hit the 1,100-mm mark and the season has not ended yet,” an IMD official said.

Normally, Delhi records 648.9 mm of rainfall during the monsoon season, according to the IMD. Between June 1, when the monsoon season starts, and September 11, the city normally gets 590.2 mm of rainfall. The monsoon withdraws from Delhi by September 25. Meanwhile, the forecourt of the Delhi airport was waterlogged for a “short period” Saturday morning after sudden heavy rains, its operator DIAL said. Sources said five flights were diverted from the airport on Saturday morning due to the bad weather conditions.