Helene is strengthening as it moves toward the U.S. Gulf Coast. It is expected to become a hurricane today and will hit Florida's Big Bend Thursday.
Tampa City officials say storm surge is a major concern as some areas could see very high water levels because of Helene.
Storm surge is the deadliest part of a tropical system and there's a tool that residents can use to identify their threat.
Many areas are forecast to see dangerous storm surges, especially between Panama City and Tampa. The coast stretching from ...