That's because numerous islands are now inaccessible.
Florida Power and Light said it had "safely shut down" one of two nuclear reactors at its Turkey Point power plant.
Florida Gov. Rick Scott mentioned the gravity of the situation at his daily news briefing Monday.
Almost 4,000,000 people were without power throughout the state and the administrator of the Federal Emergency Management Agency (FEMA), William Long, informed that some places will be without electricity for weeks. Some places might not have power for the weeks, FEMA chief Brock Long told CNN.
- Strong winds and flash flooding are still a threat as Irma spins into north Florida and toward Georgia over the next 24 hours.
A Tropical Storm Warning is in effect for.
Shares of home insurers tied to the Florida market plunged last week as investors feared historic damage from Irma.
The Jacksonville Sheriff's Office warned residents along the St. Johns River to "Get out NOW".
Storm surge warnings were in place for Tampa Bay, from the South Santee River in SC to the Flagler/Volusia County line on the Atlantic Coast and from Cape Sable northward to the Ochlockonee River on the Gulf of Mexico.
But that doesn't mean Floridians should try to go back home.
"Our command center here is running and very much hopping as we support both Houston and Florida", Holmes said.
"We have a lot of debris on the road, we have wires down, live wires", said Sanchez.
Storm surge: Large portions of Marco Island were flooded by a 3- to 4-foot storm surge, said Chris Bowden, spokesman for the Marco Island Fire Department.
"It's the worst storm I've ever seen", said South, the NOAA meteorologist.
Jacksonville schools were to be closed Tuesday pending further notice.
Hurricane Irma is a storm Americans will be talking about for generations.
The hurricane was responsible for at least 26 deaths, including 10 in Cuba, as it passed through Caribbean island nations. When it first hit Florida, it was still a Category 4 hurricane.