Hurricane Ian Upgraded to Rare Category 5 Before Landfall.

Hurricane Ian, which made landfall in southwest Florida in September, has been reanalyzed and recategorized as a rare Category 5 with 161 mph winds, making it one of the costliest storms in U.S. history. The storm caused at least 156 deaths in the United States, with 66 directly caused by the storm, and caused nearly $113 billion in damage. Climate scientists say that more hurricanes have been rapidly intensifying in recent years because of warming waters caused by climate change, making them harder to forecast and leaving less time to prepare for their impacts.