After the learning of 7/26 lesson, the Government need to focus on the following as the areas of Improvement keeping the present and growing population in mind. With a double safety factor, assuming the June 26 needs.
24 hours dedicated well trained disaster management crew, mocking these kind of scenario's on regular intervals. They should be having unconventional means like helipoters, steamers etc., to reach to places of need during such calamities.
1. The whole city's drainage system to handle such a disastrous rain. Increasing the the flow rate multifold in each of our drainage flow-ways, keeping in mind the rain water in the entire region of Mumbai. If this option does not meet 100% workable, then to remove the residents from low lying areas permanently to safer areas.
2. Both in Mumbai and Maharashtra, identifying the habitats vulnerable to mudslides/landslides/broken rocks etc., And relocate permanently the poeple to safer places.
3. Hospitals, Communication(Mobile network) Systems, Housing Societies(to help atleast floodlamping the rescue work) to have Power Generators mandatory,