"The two brothers were on the promenade, dangerously close to the waters in Marine Drive, when the tragedy took place. The 20-year-old youth lost his life, while his 17-year-old brother sustained minor injuries, since he was rescued on time," an MCGM official told PTI.
The officer added that the brothers were taken to Gokuldas Tejpal (GT) hospital in South Mumbai, where the injured has been administered first aid.
Last week, the MCGM had issued an alert that tidal waves higher than 4.5 metres were likely to hit Mumbai shorelines and also warned Mumbaikars against venturing near the sea.
The MCGM also said that six teams have been formed for sensitive areas in the metropolis, each comprising members of fire brigade personnel, National Disaster Response Force (NDRF) and lifeguards.
Comprising of 15 members each, these teams have been deployed in areas like Girgaon, Dadar, Juhu, Versova, Aksa beach, Gorai beach and Chowpatty.