kolkata climate change and global warming may hit indias gdp within a decade a report published by the mckinsey global institute mgi has saidby 2030 temperatures in india could reach such levels that outdoor workers may be forced to cut short their daylight working hours to beat the lethal heat waves the report saysthe mgi report has estimated that the impact of global heating on outdoor work and the resultant loss in productivity could put 25 to 45 of indias gdp at risk annuallyas of 2017 in india heatexposed work produces about 50 of gdp drives about 30 of gdp growth and employs about 75 of the labour force some 380 million people the report saysfor adaptation in the short term india can focus on earlywarning systems and cooling shelters to protect those without airconditioning working hours for outdoor workers could be shifted and at the extreme coordinated movement of people and capital from highrisk areas could be organized the report suggestsunless there is an effective adaptation response and decarbonization within 10 years 1620 crore people in india could live in regions exposed to lethal heat waves every yearin such an eventuality temperature could exceed the survivability threshold in many areas with just 45 hours of outdoor exposure turning fatal for a healthy wellhydrated human at rest in shade the report saysby 2050 several pockets in india and pakistan are projected to experience more than 60 annual chance of such heat waves such is the seriousness of the issue that the report suggests organized mass climate migration as one of the adaptive measuresreducing exposure in highrisk areas could be one means by which to manage risk as is being considered today in various floodprone regions mekala krishnan one of the authors of the report told toithe sectors at greater risk include agriculture mining and quarrying as also indoor sectors with poor ac penetration like hospitality transport and manufacturing the urban poor too are likely to be affected disproportionatelyheat and humidity could affect labour productivity with workers needing to take more breaks and the human body naturally limiting its efforts to prevent overexertion the report says