No I think everyone is confused in that the tunnels are on all the time. That is not true. The deep water coming from below can be turned off after the storm has passed and turned on 5 days prior to the strom arriving to the East coast. I think the forcasting of Hurricanes 5 days out if they are going to hit are pretty good nowadays. If you cool the water down by the Keys and let the cooler water flow North there would be enough cooling to protect the whole East coast. Then you just simply close the gate and the cooling no longer occurs.However, the electrical generators don't stop running because the power to run them is near the surface seperate from the cooling phase of the operation.