What is a tropical storm?
What determines a storm's strength and path?
Deadliest hurricanes in American history:
Costliest hurricanes in American history (Adjusted for inflation):
Category 4 and 5 storms:
Since 1900, just four Category 5 storms have hit the continental US. There have been 15 Category 4 storms in that time, including Hurricane Charley.
The last time the US was hit by two hurricanes of Category 4 or above in the same year was 1915. That year a Category 4 storm hit Galveston and another one hit New Orleans.
Category 5 storms since 1900 (in order of intensity):
The categories are determined by the Saffir-Simpson Scale.
CATEGORY ONE: winds 74-95 mph (64-82 kt or 119-153 km/hr).
CATEGORY TWO: winds 96-110 mph (83-95 kt or 154-177 km/hr).
CATEGORY THREE: winds 111-130 mph (96-113 kt or 178-209 km/hr).
CATEGORY FOUR: winds 131-155 mph (114-135 kt or 210-249 km/hr).
CATEGORY FIVE: winds greater than 155 mph (135 kt or 249 km/hr).