Officials in Chennai are keeping a close eye on the water level in Chembarambakkam Lake as heavy rains have caused it to rise to 21.19 feet. If it reaches 22 feet, water will be released, posing a flood risk for low-lying areas in Chennai and surrounding districts. The lake, which is one of the city's main sources of drinking water, was built centuries ago and holds historical significance. The Regional Meteorological Centre has issued alerts for Tamil Nadu in anticipation of a low-pressure system near the Sri Lankan coast.