Interesting, today we had two of the three bridges to NJ from Staten Island closed by accidents. One, on the Goethals Bridge, involved 4 trucks, one a chemical tanker. The bridge was(may still be partially) closed for hours. The Outer Bridge Crossing, I didn't hear many details on the accident, but it was a much shorter closing.
The third bridge to Jersey is the Bayonne Bridge, and that is no fast escape. From there there are several more mostly smaller bridges on any evacuation route.
I'm heading to the marina myself. ;-)
Family lives on LI - worry about them.