1. Rip currents:

Beaches are ideal places to cool off in the summer. However, when people are enjoying their leisurely fun, drowning accidents do happen, and lives are lost at the beaches every year. Studies conducted in the United States and Brazil suggested that 80% of drownings are caused by rip currents.

https://tmec.ntou.edu.tw/p/405-1016-38834,c6557.php?Lang=zh-tw

2. Mad-Dog Waves:

People on breakwaters or coastal cliffs may be swept into the sea by large overtopping waves. These waves are often called"Mad-Dog Waves" since they can rush onshore unexpectedly much as mad-dogs do humans.

https://tmec.ntou.edu.tw/p/405-1016-38833,c6557.php?Lang=zh-tw