MUMBAI, April 11 -- As Mumbai sizzles and the demand for water surges at the beginning of summer, several pockets in the city faced a water shortage as private tanker operators indefinitely suspended services on Thursday. The Mumbai Water Tanker Association (MWTA) is protesting a notice issued by the Brihanmumbai Municipal Corporation (BMC) to the owners of private wells that supply tankers with water, to secure a licence from the Central Ground Water Authority (CGWA)....