MUMBAI: CNN correspondents Helen Regan and Omar Khan report on India’s horrific water crisis which has been making the country’ poorest go through a testing time. Twenty-one Indian cities are estimated to run out of groundwater by 2020 which will eventually make the country drier due to climate change.

As India becomes more urbanized and millions of people decide to move to cities like Delhi, Bangalore and Hyderabad, India will soon be living in zero groundwater cities.

Read now: Water every 10 days: The families on the front line of India's environmental crisis