The northeast monsoon is here, and going by the forecast, the city may hit a hat-trick with normal to excess rainfall for the third consecutive year. La Nina, which is usually not good for the monsoon, may help bring more rain to the city perhaps due to a quirk in weather phenomenon.

from Times of India https://timesofindia.indiatimes.com/city/chennai/la-nina-years-gave-chennai-tamil-nadu-good-rains-will-it-repeat/articleshow/95217306.cms