Hurricane Dean has blasted across the island of Jamaica, uprooting trees and knocking down power lines.
Winds of more than 150 miles per hour caused loads of problems. This image was taken from space.
Hurricanes create much bigger waves than people are used to. This wave struck the island of Guadeloupe.
Nearby St Lucia and Martinique have already been battered by the storm as winds of up to 100mph ripped off roofs and flattened fields of crops.
People had to prepare for the worst. Low-lying areas were evacuated and schools and churches converted into emergency shelters.
Some people were panic-buying in supermarkets as they were worried that food supplies could run out.
Nasa is even bringing astronauts on board the Endeavour space shuttle back to Earth a day early as they're worried the hurricane will reach mission control in Houston, Texas, USA, which would make landing the shuttle impossible.
When the storm hit Haiti on Sunday two people were killed and more than 1,000 were evacuated.
Weather experts think Cancun in Mexico is the next place that Hurricane Dean will hit. Thousands of tourists have been evacuated.