A category 5 is the most strongest storm category ever, with windspeeds of up to 300 km/h (185 mph). It can produce waves of 5.5 meters (18 feet) and extreme damage. But, scientists planned to introduce Category 6. Fortunately, Robert Simpson, the creator of the Saffir-Simpson Hurricane Scale said that there is no idea to add it, as the scale applies to hurricanes which destroy manmade structures completely. A category 6 would cause so much damage that it could not be repaired.