At least six people have been killed as Hurricane Irma has hit islands in the Caribbean.
It's thought as many as 37 million people could ultimately be affected by the category five storm.
Irma has hit Barbuda, St Martin and Anguilla - and is headed for Puerto Rico.
The most powerful Atlantic storm ever recorded is then due to hit the Dominican Republic, Haiti, Cuba and the Bahamas, before being expected in Florida by Sunday.
Irma will likely remain at category four or five for at least the next day or two, according to the National Hurricane Centre.
Two other hurricanes - Katia and Jose - are in the same region: the first time that's happened since September 2010.