How high can waves reach?

I'm curious to know, just how high can waves reach? Are there any specific factors that influence their height? Is it possible for waves to grow so tall that they pose a threat to coastal communities? And what can be done to mitigate the risks associated with large waves? It's fascinating to think about the power and unpredictability of the ocean, and I'm eager to learn more about how we can better understand and prepare for its forces.