People have been condemned for venturing into the monster storm to capture photos or video for their social media feeds.
Local authorities have urged people to stay indoors because they could be hit by flying debris in one of the strongest storms ever recorded in the Atlantic.
Category four Irma is packing 130mph winds which have snapped trees, damaged homes and brought down a construction crane on top of a high-rise in Miami.
At least three people have already been killed, including a man whose pickup truck crashed into a tree in high winds.
More than a million homes and business are without electricity as the state braces for potentially catastrophic flooding, with storm surges of 15ft or more predicted.
Irma was heading for the south-west coast of Florida after hitting the Florida Keys, and could make a second landfall near Naples or Fort Myers as it moves north.
Hurricane-force winds extend outward up to 80 miles from the eye and tropical-storm-force winds extend outward up to 220 miles.
The storm surge remains a huge concern in a number of coastal areas.
Entire communities could be inundated with 15ft of water or more.
The National Hurricane Center is predicting a storm surge of 10-15ft from Cape Sable to Ana Maria Island, and up to 10ft in the Florida Keys.