Saffir-Simpson Scale

The Saffir-Simpson Hurricane Scale is a 1 to 5 rating based on the hurricane's intensity. This scale estimates potential property damage. Hurricanes reaching Category 3 and higher are considered major hurricanes because of their potential for loss of life and property damage. Category 1 and 2 storms are still very dangerous and warrant preventative measures.
Saffir-Simpson Hurricane Scale
Category 1
Winds: 74-95 MPH

Damage: Minimal Damage primarily to shrubbery, trees, foliage and unanchored mobile homes. No real damage to other structures.
Hurricane: Irene 1999
Category 2
Winds: 96-110 MPH
Damage: Moderate Some trees blown down. Major damage to exposed mobile homes. Some damage to roofing materials, windows and doors.
Hurricanes: Georges 1998, Floyd 1999, Frances 2004
Category 3
Winds: 111-130 MPH

Damage: Extensive Large trees blown down. Mobile homes destroyed. Some structural damage to roofing materials of buildings. Some structural damage to small buildings.
Hurricanes: Betsy 1965, Alicia 1983, Ivan 2004, Jeanne 2004
Category 4
Winds: 131-155 MPH

Damage: Extreme Trees blown down. Complete destruction of mobile homes. Extensive damage to roofing materials, windows and doors. Complete failure of roofs on many small residences.
Hurricane: Hugo 1989, Charley 2004
Category 5
Winds: Over 155 MPH

Damage: Catastrophic Complete failure of roofs on many residences and industrial buildings. Extensive damage to windows and doors. Some complete building failure. NOTE: Damage can vary greatly This info from the National Weather Service
Hurricane: Camille 1969, Andrew 1992, Katrina 2005