Delhi Water minister Atishi on Sunday wrote to Police Commissioner Sanjay Arora requesting deployment of personnel for patrolling and protecting major pipelines for next 15 days, as the national capital grapples with a water crisis. In her letter, the minister said Delhi is reeling under a severe heat wave and a water crisis. "Due to shortage of water being received in the Yamuna, water production has fallen by around 70 MGD and many parts of Delhi are experiencing water shortage. In this situation, every drop of water becomes precious," the letter said.