Bengaluru's lakes drastically declined, raising summer temperatures

Bengaluru used to have much cooler summer temperatures, reaching only 14-16°C in the 1800s. This change is due to the significant loss of the city's lakes and greenery, according to Dr. TV Ramachandra from the Indian Institute of Science. Historically, Bengaluru had 1,452 water bodies and 80% green cover, which helped keep the city cool. However, due to rapid urban growth and land development, this number has dropped drastically. By the 1970s, there were around 760 lakes, and now only 216 remain. Dr. Ramachandra's research has focused on 193 of these remaining lakes, leading to the creation of the Bangalore Lake Information System. This system helps track the city's dwindling water bodies. He explained how Bengaluru's lakes were once part of a connected network that managed water flow. This system helped prevent flooding by controlling excess water. Unfortunately, unregulated construction has disrupted this balance, particularly affecting stormwater drains known as Rajakaluves. Dr. Ramachandra urged the government to take strong action against blockages in these drains to reduce flooding. He likened the water system to the human circulatory system, saying that just as blocked arteries can cause serious health issues, clogged waterways can lead to environmental problems.