Gas stations, supermarkets and supply stores have long lines and are filled with cars as Floridians prepare for Hurricane Dorian to make landfall by filling up on fuel, buying plywood to board their windows, and one man even buying a grill as an alternative cooking method in the event of a power cut. The National Center says Hurricane Dorian has strengthened to an "extremely dangerous" Category 4 storm as it approaches the Bahamas and the east coast of the US state of Florida.