What is the human vs nature conflict in the story?

Man vs Nature: This conflict is illustrated when Rainsford struggles to survive the waves and make it to the island.

Ten minutes of determined effort brought another sound to his ears--the most welcome he had ever heard--the muttering and growling of the sea breaking on a rocky shore. He was almost on the rocks before he saw them; on a night less calm he would have been shattered against them. With his remaining strength he dragged himself from the swirling waters.