HomeFOX NEWS FOX NEWS: Hurricane Dorian strengthens to 'extremely dangerous' Category 4 storm byHat hair -August 30, 2019 0 Hurricane Dorian strengthens to 'extremely dangerous' Category 4 storm Hurricane Dorian has strengthened to a Category 4 storm with sustained winds near 130 mph, the National Hurricane Center announced Friday night. U.S. Tags: FOX NEWS IFTTT Facebook Twitter