On September 1, 2021, New Delhi recorded the highest single-day rainfall in about 2 decades—112.1mm. The highest rainfall recorded in the national capital is 172.6mm on September 16, 1963. The city received rainfall just as schools had reopened 17 months after COVID restrictions. The rainfall led to water-logging in several parts of the city leading to severe traffic jams. On average, Delhi receives 125.1mm of rainfall in September every year.