Neighbourhood News Desk/ Simran Nijhawan: The biggest high tides of this season. Very heavy showers in some areas of palgarh, thane, Mumbai and Raigarh. Yesterday heavy to very heavy rainfall is likely at some places in Mumbai. As heavy rainfall coupled with a a high tide is known to cause flooding in the City. During a high tide, the BMC closes flood gates to prevent sea water from entering the city but that also means there is no way out for the rainwater.