I did a very basic internet search and found the following links to press reports on various drownings and rescues at Umdloti Beach.
Unfortunately it is only in the last few years that some newspapers have been releasing online versions and these are seldom left online for a long period, and so we are left with a rather incomplete (and only a very recent) set of stories. Nevertheless, it does help highlight some of the more recent tragedies. And would make an interesting comparison to the official fatality numbers claimed by authorities (see letters page).
http://www.news24.com/SouthAfrica/News/Boy-presumed-drowned-20101128
http://www.dnfever.co.za/articles/articledetails.aspx?id=123947
https://www.facebook.com/TrafficKZN/posts/308726075843616
http://www.highbeam.com/doc/1G1-195327047.html
http://www.nsri.org.za/2012/09/teenager-drowns-at-umhloti/
http://www.accidents.co.za/2010/11/03/16-year-old-girl-drowns-at-umdloti-main-beach/
http://www.news24.com/SouthAfrica/News/Boy-presumed-drowned-20101128
http://www.dnfever.co.za/articles/articledetails.aspx?id=123947
http://www.iol.co.za/news/south-africa/hero-is-haunted-by-drowning-tragedy-1.385653#.VIc9dpoaLcc
http://northcoastcourier.co.za/14071/double-drowning-victim-missing/
http://www.security.co.za/fullStory.asp?NewsId=11803
http://www.dnfever.co.za/123519/news-details/%E2%80%98this-tragedy-could-have-been-avoided
http://www.sowetanlive.co.za/news/2010/11/05/teen-drowns-at-durban_s-umdloti-beach
http://www.accidents.co.za/2010/11/03/16-year-old-girl-drowns-at-umdloti-main-beach/
http://www.jbaynews.com/nsri-issues-spring-tide-warning-following-umhloti-beach-drowning/
http://www.centrumguardian.com/stories/drowning-father-rescued/
http://www.highbeam.com/doc/1G1/195327047.html
http://northcoastcourier.co.za/30433/umdloti-lifeguard-tower-disgrace/