A comparison of the rainfall in Chennai during November and December for the years 2015 and 2023

In the year 2015, the city of Chennai received more than 1200 mm of rainfall between 5 November and 10 December. On December 1, 2015, the city was heavily flooded after receiving 494 mm of rainfall in a span of 24 hours. In November 2015, the city had received an overall rainfall of 1049.3 mm.

Comparing to that, in the year 2023, within  64 hours in December 2023, 501.5 mm of rainfall was recorded. Between December 3 and December 5, Chennai’s Nungambakkam recorded 47 cm of rainfall, while Meenambakkam received 42 cm of rainfall. Avadi recorded a whopping 56 cm of rainfall between December 3 and 5.

In Conclusion, both years experienced heavy rainfall, but the distribution and intensity varied. The 2015 floods were particularly devastating due to mismanagement of reservoirs, leading to sudden release of large volumes of water. In 2023, despite higher rainfall in some areas, the damage was less due to better management of reservoirs.

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