The claims that the ten plagues of Egypt are natural phenomena doesn’t really answer the question of their Creator’s intent. As anyone knows, timing is everything, and it makes sense (to me at least) that the Creator of the universe (and by extension the natural laws that govern it) would operate within the framework that he set forth.
This claim isn’t new either; it has been floating around in Biblical studies literature for at least a half century and probably longer.
About ten years ago, a fascinating article appeared which discussed geotechnical phenomena in the Holy Land. It discusses things such as the natural origin of the parting of the Jordan and the collapse of the walls of Jericho. While these explanations certainly make sense, the timing of these–just when Joshua needed them the most–wasn’t fortuitous.