Hurricanes are some of the most destructive storms on Earth. The huge, spinning storms form over the ocean and can move onto land. The most powerful ones have wind speeds of up to 200 miles per hour. Hurricanes bring heavy rain and their winds can cause storm surges. A surge is when wind pushes ocean water onto land, causing flooding.
Hurricanes are rated on a scale of 1 to 5 based on how powerful they are. When Florence reached land, it was a Category 1 storm, the weakest level for a hurricane. This type of hurricane has winds of 74 to 95 miles per hour. As Florence moved onto land, the storm’s wind speeds slowed and it was downgraded from a hurricane to a tropical storm.
Still, meteorologists warn that Florence is a slow-moving storm that will continue to drop a lot of rain. More than 30 inches of rain have already fallen in some areas, and officials are concerned about dam and levee failures. (Dams and levees help prevent rivers from overflowing.) That could cause even more severe flooding and possibly lead to mudslides in mountainous areas.