About 20 years from now, Mumbai and Chennai could witness temperatures hotter than those we have in 150 years, a study by University of Hawaii says. The study predicts the 'tipping points' of various cities globally. By 2045, Pune, Surat, Jaipur, Bangalore and Ahmedabad would show such climate departures, which means that even the monthly dips in temperatures would be hotter than those in 150 years (1855- 2005).
Most cities across the world would have reached their climate tipping points by 2047 if carbon dioxide emissions are not reduced. Mumbai and Chennai will be the first to reach the 'point of no return' — as early as 2034 — if no efforts are made to reduce emissions. Even if efforts are made to cut emissions, Mumbai will reach its tipping point by 2051, followed by Chennai a year later. Delhi will follow suit by 2050 (in first scenario) or 2081 (in the second scenario).
Other Indian cities will only be delaying the inevitable by a few years. For example, Hyderabad would reach the tipping point by 2057 or 2085 (under two different scenarios) and Kolkata by 2053 (or 2081). The years mentioned denote the beginning of an entirely new — and hotter — climate for the city. These predictions come from 21 climate centres in 12 different countries. Ironically, the countries first impacted by these climate changes are the ones with the least capacity to respond and also the ones which are least responsible for emissions.