Hurricane Irma: 'the most catastrophic storm Florida has ever seen'

'Leave now,' governor warns, as storm bears down on Keys after leaving trail of devastation in the Caribbean, with 25 confirmed killed amid 200kmh winds Florida faces the "most catastrophic" storm in its history as Hurricane Irma prepares to unleash devastating force on the state, including 120mph winds, life-threatening sea surges that could submerge buildings and an advance battery of tornadoes. Related: Hurricane Irma: 'Life threatening storm surge expected in the Florida Keys' - latest updat...