Moron Al Gore had this all happening twenty years ago.
The Florida Keys, most of the coastline of Massachusetts, etc. was supposed to already be gone. 
technology exists capable of increasing water/atmospheric temps/humidity
doing so in say the gulf of mexico before/in preparation of hurricanes that kick off there (and head straight 4 florida) could prime conditions in such a way as to 'feed' these naturally occurring weather systems, amplifying them, the consequence of which would b seriously extreme super hurricanes.. producing mega storm surges and chaos unimaginable – that would utterly crush florida... even inland.. this is absolutely possible via ionospheric heater/geoengeneering tech, and most people would have no clue that it was weaponized weather used as an attack.
after the successful destruction of florida (which deserves it 2 b honest), this tech could then b employed all the way up the eastern seaboard... utilizing, and manufacturing if need b, a never ending series of insane, super potent weaponized storms that could b directed and sustained at will - doing monumental damage
sounds like a plausible sequence of events to me, if dark forces wanted to create a little 'state of emergency'.