This September, Hurricane Ike destroyed the coastal areas of USA. The mostly affected state is Texas. In the Saffir – Simpson Hurricane Scale (SSHS), this has been classified as Cattegory 4 Hurricane since it reached the top speed of 145 mph (~ 230 km/h).
Have a look, http://www.boston.com/bigpicture/2008/09/the_short_but_eventful_life_of.html
