tropical hurricane approaching the USA.Elements of this image are furnished by NASA.

As of 11 a.m., Ian had strengthened to an extremely dangerous Category 4 hurricane, just 2 mph shy of Category 5 status, and its eyewall was moving onshore near Fort Myers.

The storm is expected to cause life-threatening storm surge, catastrophic winds and flooding in the Florida peninsula. The center of Ian is forecast to pass west of the Florida Keys within the next few hours, and approach the west coast of Florida within areas under a hurricane warning on Wednesday.

The center of Ian is forecast to move over Central Florida Wednesday night and Thursday morning and emerge over the western Atlantic by late Thursday.

The latest advisory places Ian 45 miles west-northwest of Naples, Florida, and 50 miles south-southwest of Punta Gorda, Florida. Hurricane Ian had maximum sustained winds of 155 mph and was moving north-northeast at 9 mph.

Hurricane Warnings have been issued for: Polk, Lake, Orange, Osceola, Seminole, Brevard and Volusia counties

Click here to watch the tracking video