Ahead of the arrival of monsoon, the Brihanmumbai Municipal Corporation (BMC) has decided to take precaution by issuing warnings about days that will see particularly 'high' high tides. A circular highlighting 21 days between June 5 and September 20 has been sent to the Railways so that they can take precautionary measures.

In the shortlisted days, waves during the high tide will cross a height of 4.5 metres. seven of these days may also see the waves attaining heights of over 4.7 meters. If these days clash with heavy rainfall, it will pose a serious threat to the island city.