Hurricanes have few categories which is as stated below..
Category 1 is refer to minimal category which the winds are 74 to 95 mph and the surge are 4 to 5 Ft.Category 2 or moderate category where the winds is 96 to 110 mph and the surge is 6 to 8 ft.Next is category 3 or extensive with winds of 111 to 130 mph and the surge is 9 to 12 Ft.Category 4 or known as extreme had winds of 131 to 155 mph and the surge is 13 to 18 Ft.Category 5 or Catastrophic had winds of 155 mph or greater and the surge is up to 18 Ft.or more.
To make all of us more understand here are the illustration of what had been inform above,
NASA stated that Katrina is a categories 5 hurricane.
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