Hurricanes pose a severe threat each year during the June 1 to November 30 hurricane season, particularly from August to October. Florida is the most hurricane-prone state, with subtropical or tropical water on a lengthy coastline. Of the category 4 or higher storms that have struck the United States, 83% have either hit Florida or Texas. From 1851 to 2006, Florida was struck by 114 hurricanes, 37 of them major—category 3 and above. It is rare for a hurricane season to pass without any impact in the state by at least a tropical storm.[citation needed]