Hurricane Irma: 'We Just Don't Know How Many Are Dead'

Rescuers have admitted they do not know how many people in Florida have been killed by Hurricane Irma amid fears of a looming 'humanitarian crisis'.

Up to 10,000 people are believed to have stayed in their Florida Keys homes during the storm and now have no water, food or power, officials have warned. It comes as it emerged Irma has left nearly 4.5million people without electricity and five dead as the destructive storm hammered the state with strong winds and threats of devastating storm surges.