MIAMI (AP) Thousands of Floridians are being advised to flee ahead of Hurricane Frances.

Just weeks after Hurricane Charley devastated parts of the state, another Category 4 hurricane is bearing down on Florida. A hit from Frances would make it the worst double hurricane strike on one state in at least a century.

Martin County plans to urge up to 75-hundred residents to evacuate low-lying areas starting at noon tomorrow. More evacuation orders are likely along Florida's East Coast.

NASA says the Kennedy Space Center at Cape Canaveral will be closed tomorrow and Friday to allow workers time to board up their homes and evacuate if necessary.

National Hurricane Center director Max Mayfield says he can't emphasize enough how powerful Frances is. He says he doesn't see any sign of weakening.