what you take from a poem is subjective and personal regardless of what the author intended. But a clue to understanding a poem is to analyze the title - there are two kinds of storms in life - the physical storms outside us and the human storms of emotions. As the two lovers cling to each other sheltering from the thunderstorms, the touch of a hand ignites a storm of passion as the lovers become aware of their intimacy. That's what I intended but what you take from it is personal to you :)