Superstorm Sandy (2012), $75.4 billion in damage
When it came ashore at Atlantic City, N.J, back in October 2012, Sandy was no longer a hurricane. However, the storm was still enormous (in diameter), even if its winds were completely off the mark.
Even more, the landing of what was about to be remembered as Superstorm Sandy occurred at high tide, exacerbating the storm surge that eventually brought waves inland, flooding large portions of the northeast coast.
Then, lower Manhattan was immensely hit, with the Brooklyn-Battery Tunnel entirely flooded. The New York Stock Exchange had to stay closed for two days in a row, probably the first time after a powerful snowstorm in 1888. The effects of the saltwater inundation are still present today, and they can be seen on the train tunnel that runs under the Hudson River.