131 crores cost 600 february 28 bengaluru city city areas 1200 tubewells dried announcement bbmp karnataka government deficit rainfall 24 hours parts past year months people functionality source prioritised repairs 110 surrounding areas priority zones substantial budget level meeting long time price cap apartments dependent significant reasons multiple reasons swanky apartments falling short 1450 million litres install unaccounted posh communities highrise apartments mahadevapura whitefield avoid wastage water shortages water suppliers drinking water store water recent past water tankers cauvery river cauvery water overcharging people bengaluru water tankers bangalore water supply cauvery water connection severe water crisis east bengaluru depend crisis people living bwssb alerted residents 1000litre water tanker decreased water levels recent days things drilling bore wells civic body allocated charging exorbitant amounts running dry due hub severe drought authorised bwssb connections