I chose hurricane Katrina. It was a category 4 but it was a category 5 at one time before it hit. Katrina kept growing from a tropical depression way out in the atlantic ocean then it started to grow and when it passed into the Gulf of Mexico it grew to a category 5 but right when it was about to hit land it downsized to a category 4 then to a category 3. Katrina is responsible for about 1,200 deaths and about 75 billion dollers in damage.