Do you not know how Tsunami's work?
Apparently nobody in this thread does since Hurricanes aren't really known to trigger Tsunami's...
Tsunami's are due to sudden rough movements under ground (i.e Earthquake - hence why Mexico is shytting itself right now because an Earthquake happened off the coast).. so yeah Earthquake, tectonic movements , landslides etc..
Hurricanes are atmospheric and Hurricane Irma is just so strong that its sucking away the water within the centre of the hurricanes pressure. I get the reactions because its a rare sight but this probably wont cause a Tsunami, that water will be back soon