NASA has cancelled tomorrow's planned launch of the space shuttle, Atlantis, and has decided to move the shuttle indoors because of the approaching tropical storm, Ernesto.
The storm is currently affecting Cuba and is expected to become a hurricane as it makes landfall again in Florida on Thursday.
Tens of thousands of people have left their homes ahead of the storm.
The launch was originally scheduled for yesterday but had to be abandoned after lightning struck the launch pad on Friday.
