The civic body has said it will keep a track of reverse migration to ensure testing is expedited where needed. Under the state's My Family, My Responsibility initiative, locked houses were being watched closely and as the survey is still on, whether or not reverse migration has happened can be identified, said officials.

The civic administration is preparing for the expected second wave and already has all necessary provisions in place just like it had in April. They are now closely monitoring the population returning from Uttar Pradesh, Delhi and Rajasthan, as several houses in Dharavi are still locked. Out of the 1.2 lakh houses surveyed over two months, around 29,000 were locked and we will visit the houses again, said civic officials.