A BMC official said there has been a lot of damage to drainage and sewerage lines, especially due to Metro-3. File pic

Learning a lesson from last year's waterlogging in the monsoon due to the ongoing Metro rail work, a cautious Brihanmumbai Municipal Corporation (BMC) has asked officials to visit the sites to ensure this is not repeated. Last week, in the monthly review meeting with officials, municipal commissioner Ajoy Mehta asked assistant municipal commissioners of wards to visit Metro sites, and ensure that no waterlogging takes place during monsoon.