2025 witnessed notable environmental and social events. For the first time in 27 years, three major lakes supplying drinking water to Chennai reached full capacity, aided by Cyclone Ditwah. 

The Greater Chennai Corporation reported 1.8 lakh stray dogs, with 1.24 lakh dog bite cases recorded in the first quarter, including four confirmed rabies deaths. A rabies vaccination drive was initiated to safeguard public health.

Crimes against women and children rose sharply, with a 50.71% increase in sexual assault and POCSO cases over three years. 

Violent caste-related crimes were also reported, including the murder of a Scheduled Caste techie in July. Tamil Nadu recorded a total of 483 murders in 2025.