$ 0 0 Municipal Corporation of Greater Mumbai (MCGM) has issued an alert for tidal waves higher than 4.5 metres likely to hit Mumbai shoreline this week. The MCGM, in its circular, stated that tidal waves higher than 4.5 metres are expected to hit the Mumbai coast from Friday till June 18, for which the civic body has made arrangements to prevent citizens from venturing near the sea.Hightides near the Gateway of India on Friday caused waterlogging in the low lying areas resulting in heavy traffic jams in the city.Fifteen security guards have been posted at Gateway of India in south Mumbai from 10am to 6pm and will prohibit people from going near the sea, the circular said.Also, six teams have been made for sensitive areas in the metropolis where each will comprise members of fire brigade personnel, National Disaster Response Force (NDRF) and lifeguards. These will be deployed in areas like Girgaon, Dadar, Juhu, Versova, Aksa beach, Gorai beach and Chowpatty beach, where there are chances of flooding.A special disaster control mechanism has been put in place, where a special team will be attending to emergency calls from citizens three hours before and after the scheduled time of the high tide, MCGM said.Tidal waves measuring 4.38 metres had lashed the shores of Mumbai yesterday, which submerged several parts of the city under water.The waves had yesterday spilled into low lying areas like Worli, Shivaji Park and Mahim and several parts of south Mumbai trapping several vehicles in the water.