Mrinal Kanti Mondol, member, mayor in council of KMC's water supply department, said supply was interrupted from 9 am as CESC carried out electrical repairs at Palta treatment plant and Tala water tank.

The civic body had earlier issued warning on Friday about chances of water supply disruption. The worst hit today were families without alternative sources of water in areas of North and Central Kolkata, and Kasba.

"We are a family of seven and often face water crisis on Sundays because the whole family stays home," Kasba resident Shivani Ghosh said. "The situation got worse today; by evening almost all stored water was exhausted."

Municipal officials said pumping stations at Md. Ali Park, Auckland Square, Park Circus, Bagmari and Kasba failed to supply water to nearby areas today. B K Maity, deputy chief engineer of KMC's water supply department, said normal supply would resume by Monday morning. "The repair work will be over today," he said.