TALLAHASSEE, Fla. (AP) — Fast-moving Hurricane Helene is advancing across the Gulf of Mexico toward Florida and it’s been upgraded to a Category 2 storm. Forecasters say it threatens an “unsurvivable” storm surge in parts of northwestern Florida, as well as damaging winds, rains and flash floods hundreds of miles inland across much of the southeastern United States. Landfall is expected Thursday evening. The governors of Florida, Georgia, North Carolina and South Carolina have all declared emergencies in their states. In the Pacific, former Hurricane John strengthened Thursday morning back into a hurricane as it threatened areas of Mexico’s western coast with flash flooding and mudslides.