Dennis was starting to developed on July 4th, 2005. Hurricane Dennis didn't stop til July 18th. Hurricane Dennis went through the Caribbean Sea the hurricane became a tropical storm on the 5th. Then on the 6th it was a full out hurricane. Hurricane Dennis was a category 4. Hurricane Dennis' wind speed was 150mph. All the damage that happened was 3.71 million dollars.Windward Islands Greater Antilles (particularly Cuba) Southeastern United States (particularly Florida) Great Lakes region Canada. Dennis was said to be the most powerful storm in history. In the Carribbean 32 people died and 40 houses ruined.