The answer depends on how you think – are you a Direct Causation believer or a Systemic Causation believer? By the way, it’s not an either or choice. If you are looking for a direct, linear causation relationship between climate change and Sandy, then you may choose to ignore the event and/or react to it by building a wall to block the surge. If you believe in systemic causation, then you may choose to increase solar and wind power and reduce fossil fuels to reduce the storm surge. You can follow an excellent discussion on this by George Lakoff.