Tropical Weather Latest: Hurricane Helene is upgraded to Category 2 as it heads toward Florida

Fast-moving Hurricane Helene was advancing Thursday across the Gulf of Mexico toward Florida, threatening a “catastrophic” storm surge in northwestern parts of the state as well as damaging winds, rains and flash floods hundreds of miles inland across much of the southeastern U.S., forecasters said. The storm was upgraded to a Category 2 storm Thursday morning.

Landfall is expected by evening. The governors of Florida, Georgia, the Carolinas and Virginia 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.

Meanwhile, Tropical Storm Isaac formed Wednesday in the Atlantic Ocean and was expected to strengthen as it moves eastward, possibly becoming a hurricane by the end of the week, forecasters said. Isaac was about 690 miles (1,115 kilometers) northeast of Bermuda with top sustained winds of 50 mph (85 kph), according to the U.S. National Hurricane Center in Miami. It was moving east at about 12 mph (19 kph).

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