It is a stretch of over 200 miles of coastline getting a whole lot of rain. Over the coastal peaks, 6 to 8 inches. And the land is pretty saturated already.

It is a stretch of over 200 miles of coastline getting a whole lot of rain. Over the coastal peaks, 6 to 8 inches. And the land is pretty saturated already. But "what part do I misunderstand" kind of requires me guessing what you understand and concluded.